Abraham is among the most classic <a href="https://nameberry.com/">baby names</a> that's still widely-used today, popular for its references to both the Bible and American history. The Biblical Abraham was the first of the Old Testament patriarchs and is considered the founding father of the Jewish people. He was originally named Abram, until, according to Genesis, he was told, "No longer shall your name be Abram, but your name shall be Abraham, for I have made you the father of a multitude of nations."
 In the nineteenth century, President Lincoln hung a beard on the name Abraham, which kept it from reaching the mass modern popularity of other biblical names like Benjamin and Samuel. Interestingly, Lincoln is now a more popular name for boys than Abraham.
 Now that names like Ezekiel and Isaiah are making a comeback, more parents are thinking about a Baby Abie or -- even better -- a Baby Bram. And it does, of course, have the noble namesake of Honest Abe to recommend it. Country music singer Lila McCann chose it for her son, as did musician Ziggy Marley.
 Abraham Van Helsing is the wise Dutch doctor in Dracula who understands the ways of vampires.

Abraham

A favorite of British novelists including Evelyn Waugh and P. G. Wodehouse, Ambrose has an air of blooming well-being and upper-class erudition. It comes from the same Greek root as 'ambrosia', the food of the gods, said to confer immortality.
 Ambrose was the name of one of the important doctors of the early Christian church, the fourth century St. Ambrose. It also belonged to one of the four great Latin teachers of Christianity, who also developed the use of music in church services. TV fanatics might be interested to know that in 1961, Ambrose was designated the patron saint of educational television by Pope John XXII.
 Ambrose's only problem is finding a nickname. Am? Rosie? Bro? We're still thinking....

Ambrose

Arthur, once the shining head of the Knights of the Round Table, is, after decades of neglect, now being polished up and restored by stylish parents, inspired perhaps by the new generation of royals. Arthur has led the list of possible names for the young British princes, chosen as a middle name for Prince Louis, son of William and Catherine, Prince and Princess of Wales.
 In addition to its leading role in the Arthurian legends, Arthurs figure prominently in Nathaniel Hawthorne's The Scarlet Letter, Edgar Allan Poe's The Narrative of Arthur Gordon Pym of Nantucket and George Eliot's Adam Bede. There are also countless Arthurs in children's literature, movies, and TV -- including The Fonz of Happy Days fame. More recently, Arthur was the son of Mr. and Mrs. Santa in the eponymous movie Arthur Christmas.
 Arthur has many notable namesakes, including playwright Arthur Miller; writer/astronomer Arthur C. Clarke; writers Arthur Conan Doyle, Arthur Rimbaud and Arthur Koestler; philosopher Arthur Schopenhauer; conductor Arthur Fiedler; and tennis great Arthur Ashe, the first African American to win the U.S. Open. Queen Victoria's seventh child was Prince Arthur.
 Arthur was a Top 20 name from at least 1880 through 1926. And in 2011, actress Selma Blair named her son Arthur Saint.

Arthur

Benjamin is a biblical name that has enjoyed widespread favor for decades, ranking in the US Top 50 for almost half a century and the Top 10 from 2015 until 2023. 

One of those golden boys' names that feels traditional as well as sensitive and stylish, Benjamin has the further advantage of the friendly, accessible nickname Ben.
Benjamin is hugely popular not just in the US but in a range of other western countries, including France and Germany along with Scandinavia and Latin America. The names Benjamin and Ben will be familiar around the world.
 Benjamin is derived from the Hebrew name Binyamin, from the elements ben, meaning "son" and yamin, "right hand." In the Old Testament's Book of Genesis, Benjamin was the youngest of the twelve sons of Jacob and Rachel and he was one of the founders of the twelve tribes of Israel. 
 
There have been numerous notable Benjamin namesakes, from Benjamin Franklin to Dr. Benjamin Spock. The name's popularity spiked after the release of The Graduate in 1967, with Dustin Hoffman playing the iconic Benjamin Braddock.
 Benjamin is the name of the sons of Kelly Preston and John Travolta as well as of Gisele Bundchen and Tom Brady.

Benjamin

Christopher derived from the Greek Christophoros, which is composed of the elements Christos, referring to Christ, and phero, meaning "to bear." 
 
The name was originally used figuratively, to represent the bearing of Christ in one’s heart. Later it became used to honor Saint Christopher, a third century martyr who became the protective saint of travelers, reflecting the legend of Christopher being the giant who carried the Christ Child over a river.
 
Christopher is an evergreen classic that dropped from Top 25 status in 2013, in spite of its appealingly strong, sincere, straightforward image, combined with a softer, more modern sound than, say, Robert or Richard.
 
The name appeals to a wide range of parents, and has been chosen by several celebrities, including Sean "Diddy" Combs.
 
The almost ubiquitous American nickname is Chris, but a more recent one is Topher, and there are British variations that might add a more individual spin to the name—Kit, Kip and Christy. Two Christophers known to every schoolchild: Christopher Columbus and Christopher Robin.

Christopher

Commodore

This Theodore sound-alike derives from the name Diodorus, associated with the ancient Greek historian Diodorus Siculus.

Diodor

Dorothea is a flowing and romantic Victorian-sounding name which was popular in the early decades of the twentieth century, but has been off the charts since 1970. Definitely on the brink of a revival!
 Dorothea has had a long literary tradition, including as a clever, beautiful character in Don Quixote and the idealistic heroine of George Eliot's Middlemarch.
 Worthy namesakes include Dorothea Dix, nineteenth century activist for the mentally ill and Civil War nurse, and the influential documentary photographer Dorothea Lange, known for her moving portraits taken during the Great Depression.
 Appealing nickname possibilities include Dorrie, Doro, Dodie, Dot, Dottie and Thea.

Dorothea

The most minimalist of names, Ed is decidedly out -- though that usually means it's due to swing back in.  More stylish these days: Ned or even Ted.

Eddy, recently used by Celine Dion for one of her twin boys, was chosen to honor Eddy Marnay, who produced her first five records. Though less common a nickname for Edward than Eddie, Eddy is used more often on its own.

Eddy

Eleanor's straightforward feminine image combined with its royal medieval history is striking just the right note for parents in search of a girls' name that combines substance and style.
 
Big plus: Eleanor is a serious name, with two nicknames—Ellie and Nell/Nellie—that are seriously endearing. Nell is more distinctive, but Ellie is undeniably one of today's top <a href="https://nameberry.com/list/508/cute-baby-names-for-girls">cute girl names</a>.
 While some think Eleanor is a variation of Helen via Ellen, it actually derives from the Provencal name Aliénor, of highly-debated meaning. It may come from the Germanic name Adenorde, meaning "ancient north" or "noble north". Another theory is that it derives from the Latin phrase alia Aenor, meaning "other Aenor," used to distinguish some original Eleanor, who was named after her mother Aenor. Queen Eleanor of Aquitaine brought it from France to England in the twelfth century. Other spellings include Elinor and Eleanore.
 
Diane Lane has an Eleanor, and Katie Couric has an Elinor, using the variant spelling. (Jane Austen used both versions—Eleanor in Northanger Abbey and Elinor in Sense and Sensibility.)
 
A notable namesake is First Lady Eleanor Roosevelt. Two other English queens bore the name: the wives of Henry III and Edward I. Eleanor Shellstrop was the protagonist of television show The Good Place.
 
Eleanora and Leonora are pretty, more feminine variations. Ellen and Lenore are shorter forms.

Eleanor

Elliot (which boasts several spellings depending upon how many 'l's or 't's you want to use) is a winner -- it has the ideal quality of being neither too common nor weirdly unique. Elliot had a style boost back in the early 1980s via the young hero of the movie E.T. , who was named Elliot. Since then there have been Elliots on Law & Order: SVU and Mad Men.
 Elliott namesakes include composer Carter, actor Gould, and photographer Erwitt.

Elliot

Esidore

Felix is one of those ancient but nontraditional names for boys that have come into favor over the past few decades, a favorite of parents who want a masculine name with history and heft that breaks ranks with the standard Franks and Freds. Felix is also an international darling, ranking in the Top 100 in several European and English-speaking countries.

Felix was originally a Roman surname but was adopted as a nickname by the ancient Roman Sulla, who believed that he was especially blessed with luck by the gods. It is the name of four popes and sixty-seven saints; in the Bible, Felix is a Roman procurator of Judea.
 
Felix, energetic and upbeat with a felicitous meaning, has finally transcended its negative associations to Felix The Cat and the persnickety Felix Unger. 
 
The name appears in literature as the central character in George Eliot's novel Felix Holt, the protagonist of Thomas Mann's Confessions of Felix Krull, in Thomas Hardy's Tess of the D'Urbervilles, Henry James's The Europeans, Kurt Vonnegut's Cat's Cradle, and as a member of the Volturi Guard in the Twilight series. In movies Felix has popped up in everything from several James Bond films to Spy Kids and The Hangover.
 
Gillian Anderson and Elizabeth Banks are two modern celebrities who chose Felix for their baby boys. A notable namesake is Felix Frankfurter, a long-term Supreme Court Justice.
 
Popular in the Hispanic community, Felix is also celebrating a surge abroad. Felix has been on the <a href="https://nameberry.com/popular-names">U.S. popularity list</a> for as long as records have been kept and is rapidly becoming a Nameberry fave.

Felix

Feodore

A doubly Presidential name, via Pierce and Roosevelt, Franklin was given an initial boost via the fame of Benjamin Franklin. It also has a literary tie to the main character of the Wilkie Collins classic The Moonstone.
 Franklin was a Top 100 name at the peak of the FDR period. But will Franklin get a boost from the pro-Fran-name feeling evidenced since the ascension of Pope Francis? Time will tell.

Franklin

Frederick, and friendlier nickname Fred, seemed almost to have disappeared, leaving just the memory of Freds past such as Astaire, Mr. Rogers and Flintstone. But today's parents are beginning to recognize it as a strong classic and one of the top <a href="https://nameberry.com/list/341/royal-names-for-boys">royal baby boy names</a>.
 Previously, Frederick had taken on a rather forbidding, foreign, military air, reminiscent of Frederick the Great, the enlightened king of Prussia who laid the foundations of the powerful Prussian empire.
 For African-Americans, Frederick can be seen as a hero name, honoring Frederick Douglass, who rose from slavery to power as a political activist.
 Frederick appears as a character in Shakespeare's As You Like It and the novels of, among others, Jane Austen and Henry James.
The name is often streamlined to Frederic and even Fredric. And if you don't like Fred or Freddie (though we do), another nickname is Fritz.
 Federico is the appealing Italian and Spanish form, as in renowned poet Federico Garcia Lorca.

Frederick

This variation of Theodore is familiar here mostly via the great Russian novelist Dostoyevsky. It was also the name of three early tsars of Russia.

Fyodor

Fyodore

Henry is back. The classic Henry climbed back onto the Top 10 in the US in 2021 for the first time in over a century, and now stands at Number 7.
 Like James and Theodore, Henry is a traditional name that also manages to feel stylish. Despite its popularity, it's not for everyone, but in some upscale American suburbs, it can seem as if every other little boy is named Henry or Theo or Jack.
 Henry was derived from the French Henri, which ultimately comes from the Germanic name Heimrich, made up of the components heim, meaning "home" or "estate," and rich, meaning "ruler." The most famous bearer is Henry VIII of England, best known for having six wives—two of whom he beheaded for not bearing him sons. It’s been used in the British royal family many times since, including for the current prince better known as Harry.
 
Other illustrious Henrys that might provide baby name inspiration include Henry David Thoreau, Henry (Hank) Aaron, Henry James, Henry Ford and Henry Miller.
 Numerous celebs have chosen Henry for their sons, from Julia Roberts to Minnie Driver to Heidi Klum to Colin Farrell.
 Appealing international versions include Arrigo, Enrico, Enzio and Enrique.

Henry

Heliodore

A classic variation of the name Isidore, both Isadore and Isidore were equally popular at their peak in the 1910s. They were historically used among Jewish families — Isidore and Isadore were often used as Americanizations of Jewish names such as Israel and Isaac.
 
Greta Gerwig and Noah Baumbach have a son named Isadore, born in 2023.

Isadore

Isabel and Isadora are back: could it now be time for a more widespread revival of Isidore? In 2014, both Isidore and Isadore were on the list of fastest-rising names in the US.
 A common ancient Greek name belonging to several saints--including Saint Isidore the Ploughman, patron saint of Madrid and the great encyclopedist St. Isidore of Seville, whose work formed the basis of much medieval knowledge--Isidore was adopted by Spanish Jews to the point where it was almost their exclusive property.
 In addition to the obvious Izzy, another traditional nickname is Dore/Dory.

Isidore

Jonathan was derived from the Hebrew name Yehonatan, eventually contracted to the modern Yonatan, meaning "gift of Jehovah." It comes from the elements yeho, in reference to God, and natan, meaning "to give." In the Old Testament, Jonathan was the valiant eldest son of King Saul, and it was his friendship with brother-in-law David that gave rise to the expression "Jonathan and David" to describe devoted, steadfast friends.
 
Jonathan is the biblical name that started to replace the stalwart John in the late fifties, sounding more playful, sensitive and modern. Now, after being high on the list for several decades, Jonathan has pretty much lost its luster.
 
Anne Hathaway named her oldest son Jonathan Rosebanks in 2016.
 
Jonathan has spawned numerous spelling variations, including Johnathan, Jonathon, and Jonothan.

Jonathan

Lawrence is the dominant spelling in the US, but in the UK Laurence and Lawrence are given in almost equal numbers each year, often with the adorable nickname Laurie or Lawrie. British actor Sir Laurence Olivier is a famous bearer.

 There have been several saints with the name Laurence, which account for its historic popularity in the Christian world. Nowadays, it's an underused classic with a warm, distinguished appeal.

Laurence

Leo is a strong-yet-friendly name that was common among the Romans, used for thirteen popes, and is now at its highest point ever in the US thanks in part to Leonardo "Leo" DiCaprio.

Derived from the Latin meaning "lion", Leo is one of those names, like Luke and Finn, that many people assume must be short for something but that is authentically a complete name in its own right. That said, Leo can but short for any number of names, from Leonardo in Latinate languages to Leon and Leopold in Germanic languages. We've even heard of little girl Leonoras and Leonies called Leo: How cute is that?

Leo's simplicity makes it an international star, ranking in the Top 100 in countries as diverse as Ireland and Israel, Spain and Sweden, Austria and Australia. Leo is a truly diverse name, a perfect choice for any family crossing countries or blending cultures.
 
Leo's only real downside is its universal popularity and familiarity. If you call your child Leo, you and they will almost certainly encounter many other Leos over the years of all types and ages. Plus or minus? Or both?
 
Penelope Cruz and Javier Bardem called their son Leo, as did actress Kim Raver, NASCAR driver Jeff Gordon and Kristin Olson. 
 Famous Leos of the past include Pope Leo the Great, a number of early saints, and Leo Tolstoy, as well as Dead End Kid Gorcey, colorful baseball manager Durocher, influential gallerist Castelli and the leonine MGM icon. There have been Leos seen on everything from The West Wing to Charmed to Grey's Anatomy to Seinfeld's Uncle Leo.

Leonidas is an ancient name that has started rising again along with centuries-old names such as Augustus and Cato. The original Leonidas was the most famous of Sparta's warriors, sacrificing his life at the Battle of Thermopylae; there is also a saint Leonidas. More stately than Leon, more melodious than Leonard, Leonidas is a leonine name that commands respect. In Greek, the name is pronounced leh-oh-NEE-das, but Americans tend to say lee-oh-NYE-dus.

Leonidas

Liodor is the Leo and Theodore mash-up you didn't know you needed — with authentic Russian roots! It ultimately derives from the Greek name Heliodoros.

Liodor

This attractively energetic Italian version of the classic Matthew is primed to move further and further into mainstream American nomenclature. Mateo is technically the Spanish version, but many parents in the US use the two spellings interchangeably. 
 
In the US, about 12,000 baby boys were named Mateo, Matteo, or Teo in 2021, vaulting the name in all versions into the Top 10. Mateo alone, by far the most popular version, lies just outside the Top 10.
 Actor Colin Firth has a son called Matteo, as does Ricky Martin; the Benjamin Bratts and Tom Colicchios have boys named Mateo. We're sure that both these spellings will keep climbing in tandem, sharing the possibility of the lively nickname Teo.

Matteo

With Matthew sounding somewhat exhausted, and ancient endings sounding new again, this New Testament apostolic name makes an appealing and recommended choice. Both Mathias and Matias are well used in the Hispanic community, and throughout Europe. Will Ferrell and his Swedish wife chose Matias for their second son.
 In the Bible, Matthias is the apostle chosen to replace Judas Iscariot. The Catholic and Eastern Orthodox churches honor Matthias as a saint.
 The Mathias spelling is used by George Eliot for the father of the protagonist of her novel Adam Bede.
 Matthias is popular abroad, and especially in Austria, France, The Netherlands, Iceland and Belgium, where it is normally pronounced Muh-TEE-us, though Americans are more likely to say Mah-THY-us.

Matthias

Nathaniel was derived from the Hebrew name Netan’el, meaning "gift of God," composed of the elements natan, meaning "to give," and ’el, in reference to God. The name is featured several times in the Old and New Testaments, typically spelled Nathanael. In the New Testament, Nathanael is also known by his other name, Bartholomew.
 
Although Nathan is more popular, the more dignified Nathaniel dropped out of the Top 100 for the first time since 1977 in 2016. Despite the profusion of Nat names around, Nathaniel remains singularly appealing and distinctive, with several attractive nicknames — Nat, Natty and Nate.
 A boy named Nathaniel would have any number of real life and literary namesakes to inspire him. These include Revolutionary General Nathanael Greene, enslaved rebel Nat Turner, writers Nathaniel Hawthorne and Nathanael (born Nathan) West, lithographer Nathaniel Currier, partner of Ives, and singer/pianist Nat "King" Cole.
 An early literary character with the name is Sir Nathaniel in Shakespeare's Love's Labour's Lost. And then there was Natty Bumpo in James Fenimore Cooper's Leatherstocking Tales, Nathaniel Winkle in Dickens's The Pickwick Papers, and later Dr. Nathaniel Branden in Atlas Shrugged.
 In the realm of pop culture, we find such Nathaniels as Nate Fisher in Six Feet Under, and others in The Wire, Gossip Girl and Enchanted, as well as Pirates of the Caribbean character Nathaniel Hawk.

Nathaniel

Ned is a gently old-fashioned Nancy Drew-Bobbsey Twins-era short form for Edward that sounds cooler than Ed and is enjoying a small style renaissance.
 Usage of Ned in literature goes back to a Ben Johnson character in 1614, and it is also the name of the protagonist in James Fenimore Cooper's Ned Myers. In Australia, Ned Kelly is famous as a larger-than-life legendary outlaw figure. In this country, Ned Rorem is a respected modern composer.
 There was a 1990s sitcom called Ned and Stacey, and other Neds have appeared in The Simpsons (neighbor Flanders), Groundhog Day and School of Rock. Ned Stark is a prominent, and unusually heroic, character in Game of Thrones, giving the name some new cultural cache, though we can't recommend using his proper name, Eddard.

Oliver is an international star, ranking near the top of the charts in the US and throughout the English-speaking world, along with a host of European and Latin American countries, from Norway to Chile, Slovenia to Switzerland.
 
Long a popular choice in England, Australia and New Zealand, Oliver entered the list of Top 100 <a href="https://nameberry.com/boys-names">baby boy names</a> in the U.S. for the first time in 2009, but has already jumped to the top of the charts. Why? Because Oliver is energetic and good-natured, stylish but classic, with a meaning symbolizing peace and fruitfulness. 
 
Oliver derives from Olivier, the Norman French variation of the Ancient Germanic name Alfihar ("elf army") or the Old Norse Áleifr ("ancestor's relic"), from which comes Olaf. Olivier emerged as the dominant spelling for its associations with the Latin word oliva, meaning "olive tree."

Oliver was used as a given name in medieval England after the spread of the French epic poem ‘La Chanson de Roland,’ which features a character named Olivier. It lost favor after the seventeenth century rule of Oliver Cromwell, then was revived in the nineteenth century. 

Oliver's biggest boost in this country came from the hit book and movie Love Story, which also catapulted the name Jennifer to stardom. Notable namesakes range from Oliver Wendell Holmes to Oliver Hardy to Oliver Stone. In fiction, there is Oliver Twist, and Oliver is also a Harry Potter name.
 Oliver works particularly well with single-syllable surnames, as in Oliver Stone, North and Puck (son of Wolfgang). Other celebrities who have chosen Oliver include Bridget Fonda, Fred Savage, Stephen Stills, and Taylor Hawkes. 
 International forms include the French Olivier, the Spanish Olivero, and the Italian Oliviero.
 Parents considering Oliver for their sons might consider that with Olivia at the top of the charts for girls, there will be an awful lot of children with names starting with Oliv-.

Oliver

As Polydoros, this rare Greek name belonged to several figures in Greek mythology, including a son of King Priam of Troy.

 This Anglicized form (also spelled Polidore) has been borne by eminent people including the Italian humanist scholar and historian Polydore Vergil, English saint Polydore Plasden, and the Belgian rower and Olympic medalist Polydore Veirman (1881-1951).

Polydore

Presidential surname adopted as a first by numbers of midcentury African-American parents. 

Roosevelt

A common epithet of Christ, frequently heard in the Hispanic community, Salvador could also be a great choice for artistic parents, given the continuing popularity of Dada and Surrealist painter Salvador Dalí. (If Monet and Raphael get a look in, why not Salvador?)

Salvador

Salvadore

Sebastian is an ancient martyr's name turned literary, and Little Mermaid hero—think Sebastian the Crab—that's more popular than ever, as a classic-yet-unconventional compatriot for fellow British favorites T Theodore and Oliver.
 Sebastian is derived from the Greek Sebastianos, meaning "from Sebastia." Sebastia was a city in Asia Minor—modern day Sivas, Turkey. Sebastian is a name with a substantial history, first as the third-century martyr whose sufferings were a favorite subject of medieval artists, then as the name of memorable characters in such varied works as Shakespeare's Twelfth Night and The Tempest and Evelyn Waugh's Brideshead Revisited.
 Sebastian is high on the lists in countries as widespread as Austria, Denmark, Romania, Australia and Chile. Some more down-to-earth nicknames for the relatively elaborate Sebastian not often heard in this country are Seb, Baz and Bas. 
Several celebs have chosen the sophisticated Sebastian for their sons, including James Spader, Kim Fields, Malin Akerman and Tommy Hilfiger.

Sebastian

An approachable mini name that could go on the birth certificate, but may work best as a nickname. Full name options include Thaddeus, Theodore, and Thomas, which was the given name of Abe's son Tad Lincoln. Taddy is a rare alternative to Teddy.

Teddy is in some ways one of those midcentury boys' nicknames -- like Jimmy or Bobby or Billy -- yet because it was never that popular, it feels timeless too. The preferred short form of Theodore these days may be Theo and of Edward may be....Edward, but Teddy can work adorably for either and grows up to Ted. And of course, let's not forget the inevitable teddy bear.

Teddy

An international take on Theo that would be easily wearable for a child in the US or any European culture. 

Traditionally a nickname for international variations of Theodore or Matthew, including ultra popular Mateo and Matteo, Teo can also stand on its own. In fact, Teo rose into the Top 1000 in 2022, proving its ability as a stand-alone name.

You’re most likely to find this Theodore cognate in Eastern Europe, where it ranks among the top names for boys in the Czech Republic, Slovenia, Poland, and Romania. The nickname Teo is a real winner.

Teodor

A streamlined spelling of the classical British Thackeray — no wonder this is the more common variation in the US. Thackery makes a preppier, more unusual alternative to Zachary.

Thackery

Thaddeo

Thaddeus, a distinguished, long-neglected name, has several areas of appeal: a solid New Testament legacy, a nice antique feel, and the choice of several more modern nicknames and international variations.
 In the Bible, Thaddeus was one of the original Twelve Apostles.
 Thaddeus has made quite a few screen appearances, ranging from Spongebob Squarepants to Police Academy to Get Smart (it was the given name of the Chief) to Harry Potter. As Tadzio—the Slavic version—he played a leading role in Thomas Mann's Death in Venice.
 In real life, Thaddeus Stevens was a dominant political figure during the Civil War. Mia Farrow has a son named Thaddeus.

Thaddeus

See the popularity graph below for the name Theo? It's been heading straight uphill since 2010, when it hopped back onto the Top 1000 after a 60+ year absence.
 
Now in the Top 100 in this form, Theo's popularity is even wider given its common use as a nickname for Theodore, which made the Top 10 for the first time in 2022. This might be the generation of Theos.
 
Theo's newfound popularity extends far beyond the US and the rest of the English-speaking world. It's currently a Top 100 name in Germany, Brazil, Scandinavia, and beyond, as well as being a popular choice for pets.
 Theo first made an impact as the name of the only son on "The Cosby Show," earlier it was associated with Vincent van Gogh's supportive brother Theo.

Theo

A Germanic name used in early medieval Europe that today could be cool route to nicknames Theo and Teddy.

Theodemir

The name of the King of Rohan in J. R. R. Tolkien’s The Lord of the Rings, supposedly a translation of Rohirric Tûrac ("king"). Tolkien based the Rohirric language on Old English.

Theoden

Theodora is one of the most revival-worthy of the charmingly old-fashioned Victorian valentine names, softly evocative but still substantial, as is the reversed-syllable Dorothea. 
 
The name Theodora was borne by several saints and by the beautiful ninth wife of the Emperor Justinian, who became the power behind his throne. A later royal was Princess Theodora of Greece and Denmark, the older sister of the late Prince Philip, Duke of Edinburgh. 

 Keith Richards named his daughter Theodora (with whom he recently collaborated on a best-selling children's book) in 1985; Robbie Williams did the same just last year. In TV's Grey's Anatomy Dr. Theodora "Teddy" Altman was a surgeon.

 Theodora offers a menu of neat nicknames, from the classic Teddy to trendy Thea to the vintage Dora. Theodora also has some cool international variations as well: Theodosia, Feodora and Teodora. It reentered the US Top 1000 in 2019 for the first time in over 60 years and seems destined to follow brother name Theodore toward the top of the list.

Theodora

Theodoric feels prehistoric, though with short form Theo one of the hottest names around, this old <a href="https://nameberry.com/baby-names/494/german-names-for-boys">German names for boys</a> may soon feel new again.

Theodoric

Theodoro

Theodosios

While some might assume this to be a variation on Theodore, Theodule's etymolgy actually stems from Theodulus. Though neither of these forms have attraction much attention recently, both Theodore and nickname Theo are rising up the US popularity charts. This could create an alternate path to the desirable nickname.
 Théodule Ribot was a nineteenth century French realist painter.

Theodule

While Theodore means "gift of God," Theodulus has a much more solemn meaning. Nonetheless, its s ending and alternate path to nickname Theo could make it attractive to some brave parents.
 Theodulus was the name borne by several early Christian saints.

Theodulus

Theophile

This is a multi-syllabic New Testament relic that could be yet another fresh way to get to Theo. In the beginning of Luke's gospel, he dedicates his words to Theophilus.

 Theophilus North is the title of a novel by Thornton Wilder and the name of its protagonist.

Theophilus

Theopolis

A solid classic with plenty of history, Thomas strikes the balance between strength and gentleness. A favorite in the UK, a staple in France, and Australia, and never absent from the US Top 100, Thomas feels like a safe bet and a name that fits into any era. 
The Greek form of the Aramaic name Ta’oma, Thomas means “twin.” It came about in the Bible because there were too many apostles called Judas, and so, Thomas became the “twin”, to reflect his close brotherhood with Jesus. 
Known as “Doubting Thomas” due to his initial skepticism of Jesus’s resurrection, he went on to become a martyr, and there was no need to doubt Thomas’s potential as a given name. 
Brought into common usage by the Normans, it was then always among the 5 most common English names for boys at any point between the 13th and 19th century. 
While it has fallen down the US charts in recent years, it remains a familiar and trusted choice. Given to over 6000 boys every year, it has made a steady climb back into the Top 50. 
Across the pond in the UK, both Thomas and Tommy make the Top 30, while Tom, Tommy-Lee and Tommie have made their mark in the Top 1000. 
As a well-established classic, Thomas naturally comes with plenty of noteworthy namesakes. “Thomas the Tank Engine” might appeal to you kids, but there’s also the theologian, Sir Thomas Aquinas, the cardinal Thomas Wolsey, the Founding Father, Thomas Jefferson. the philosopher, Thomas Hobbes, and the writer, Thomas Hardy. 
More recent namesakes for those who aren’t into history include actors Tom Hardy, Tom Cruise, and Tom Hiddleston, singers Tom Parker and Tom Fletcher, Olympic diver Tom Daley, and Thomas Sanders, of YouTube fame. 
A timeless all-rounder, Thomas comes with the intuitive nicknames, Tommy and Tom, which feel sweet for a child but not too cutesy for a grown-up. For more unexpected options, you could try the nature-inspired Moss or Scottish Tam. 
Unlikely to go out of style anytime soon, Thomas is a refined but approachable choice. If the popularity does give you pause, however, you could try the surname-inspired Thompson, or an <a href=“https://nameberry.com/list/492/100-classic-boys-names--below-the-top-1000/all”> underused classic</a> like Marius, Rufus, or Phinneas. 
Alternatively, there is a wealth of interesting variants to ponder, from Italian Tommaso and Scottish Tavish to Croatian Tomo– and for girls, there’s Thomasina, Tomine and Tamsin.

Thomas

Thor, the powerful name of the Norse god of thunder, strength and rain, would make a bold statement. Long a comic book staple, Thor has now invaded the big screen, and could land on birth certificates as well.
 Thor Heyerdahl was a famous Norwegian anthropologist/adventurer, author of the book Kon Tiki.
In Norse mythology, Thor was the son of Odin--another crossover name possibility--who was sometimes referred to as Bjorn in Old Norse poetry. Tor is a popular variation (which is also the Hebrew name of a bird that symbolizes the arrival of spring).

Thor

Known as a British royal family line as well as a style of architecture, this name has a forbidding solemnity; schoolmates might also confuse it with tutor. 

Tudor

Theophane

Theotime

William is one of the most enduring of classic names for boys. It's also among the most popular boys' names, as American parents see it as being ideally conservative yet contemporary, and hands-down the most popular <a href="https://nameberry.com/search/boys-names/w">baby name beginning with W</a> of all time. 
 For 400 years, William has been second only to John as the most popular name in the English-speaking world. And now of course, it's also a newsy name—thanks to Britain's high-profile Prince William.
 William is derived from the Germanic name Wilhelm, composed of the elements wil, "will," and helm, referring to a helmet or protection. The name was introduced to England by William the Conqueror, with William being the Norman variation of the name. In Central and Southern France, it was translated as Guillaume.
 
In terms of short forms, yesterday's Bills and Billys have given way to today's Wills—or Williams, with no diminutive—though a few hip Billys, including Helena Bonham Carter and Tim Burton's, have surfaced recently. 
 But Irish spinoff Liam is the most stylish William nickname and has now superseded William, becoming the most popular boy name in America. Riding the William bandwagon is the Dutch Willem, which comes with the unique nickname Pim.
 
William has long reigned as a royal name in the U.K. There are tons of worthy namesakes called William, including William Shakespeare, Bill Gates and four U.S. presidents.

William

Zevediah

MiaLen's list "Alternatives to Theodore" of 64 great name ideas: Abraham - Zevediah!

Alternatives to Theodore

Presidential, literary, and bursting with history galore, Theodore is a favorite (ranking in both the Nameberry and US top 10). Here are some alternatives!