In this country, more recognizable with the Alistair spelling. 

Alasdair

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

The name August is at its highest point since the 1890s, when it ranked among the Top 100 boy names in the US. And deservedly so, given its great meaning, historic roots, and cool nicknames.
THE celebrity baby name of the moment, August was chosen by both Princess Eugenie and Mandy Moore for their baby boys in early 2021. Before that, August had been heating up in Hollywood – used by Mariska Hargitay and Peter Hermann, Lena Olin, Dave Matthews and Jeanne Tripplehorn for their sons
August is the only truly popular month name for boys. The month of August was named after the Emperor Augustus.
 August has two august literary namesakes: the Swedish playwright August Strindberg (it has always been a popular name in Scandinavia), and August Wilson, as well as photographer August Sander.
 The French version is Auguste (ow-GOOST), as in Edgar Allan Poe's clever detective Auguste Dupin and famed sculptor Auguste Rodin.

August

This evocative name of one of the Three Wise Men of the Orient, also spelled Balthasar, may finally be ready for prime time. Balthazar, Melchior and Caspar were the Magi who brought gifts of gold, frankincense and myrrh to the baby Jesus, though their names were not mentioned in the Bible.
 Balthazar, in its various spellings, has been attached to a number of distinguished artists, writers and philosophers of the past; the most prominent contemporary bearer is Balthazar Getty, actor and great-grandson of J. Paul Getty. The iconoclastic modern painter Balthus was born Balthasar.
 Balthazar is well represented in literature. The name appears in no fewer than four Shakespeare plays, is the title of a Lawrence Durrell novel, is the main character of a Balzac novel, and has been seen in everything from a James Bond film to Buffy the Vampire Slayer to The Smurfs to Xbox and online games, and there is a J. P. Donleavy novel titled The Beastly Beatitudes of Balthazar B.

Balthazar

Conrad has a somewhat intellectual masculine image, a solid name that has been consistently on the popularity lists, especially well used in the 1920s and 30s, and given a pop of rock energy by the Elvis-like character of Conrad Birdie in Bye, Bye, Birdie--("We love you Conrad, oh yes we do!").
 Conrad has been both a saints' name and a German royal appellation. One of its most well-known bearers is hotelier Conrad Hilton, great-grandfather of the Paris generation. Conrad was the prototypical Byronic hero of his poem "The Corsair." There have been fictive Conrads on shows like Weeds and CSI.
 Corrado is the attractive Italian form.

Conrad

Dashiell, though missing from many other name sources, is among the hottest new names, chosen by such celebs as Cate Blanchett and author Helen (Bridget Jones) Fielding. With its great dash and panache, Dashiell is associated with detective writer Dashiell Hammett (born Samuel, as in Sam Spade, Dashiell being his mother's maiden name). Alice Cooper was ahead of the game: He named his son Dashiell in 1985.
 For those still confused about the pronunciation, it's kind of similar to castle or bashful. And anyone can pronounce Dash, which is such a dashing nickname.

Dashiell

Dimitri is a Slavic variation of the Russian Dmitriy, a name that comes from the Greek Demetrius. Demetrius was derived from Demeter, the name of the Greek goddess of fertility and farming. Among the possible spelling variations are Dmitri, Dmitrii, Dmitriy, and Dmitry.
 
Dimitri is a worldly, artistic, and attractive name. It has been on and off the bottom of the US Top 1000 list in recent years. Dmitri is another possibility that may prove more challenging for some English speakers to pronounce, although it was the spelling Mila Kunis and Ashton Kutcher chose for their son.

Dimitri

Emmett, honest and sincere, laid-back and creative, is on the rise as a male cognate of the megapopular Emma and Emily, not to mention being a character in the popular Twilight series.
 Emmett originated in England as a masculine diminutive of the German Emma; the Hebrew characters pronounced eh-MEHT mean truth, so that might be considered another definition. Emmet is another, less popular spelling.
The death of young Emmett Till helped spark the civil rights movement.

Emmett

Evander is a name that could build on the popularity of shorter form Evan, and could work and play well with schoolmates like Zander and Xander.
 Evander was prominent in Greek and Roman mythology: in classical lore Evander was a wise Arcadian hero who founded the city in Italy that preceded Rome, appearing in Virgil's Aeneid.
 Evander also derives from a Norse name meaning bow warrior.
 In modern times, the name has been associated with boxing champ Evander Holyfield.
 Evander could make a more distinctive aternative to Alexander.

Evander

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

Gabriel has become a biblical favorite, an angelic choice that's lighter and less patriarchal than some of his Old Testament brethren. Derived from the Hebrew name Gavri’el, Gabriel is taken from the elements gever, meaning "strong," and ’el, in reference to God.
 
In Abrahamic religions, Gabriel is the archangel who heralded the news of Jesus' birth, and appears in Christian, Jewish and Muslim texts. He presides over Paradise, serving as the angel of mercy, life, joy, judgment, truth and dreams. 
 In addition to all his other responsibilities, Gabriel is the patron saint of broadcasters and diplomats, and he governs Mondays and the month of January, making Gabriel one of the top <a href="https://nameberry.com/list/629/71-wonderful-names-for-january-babies">January baby names</a>. 
 
Gabriel has proven itself a friendly and appealing alternative to Michael, that other, long-reigning archangel. Gabriel enjoys remarkable international popularity, ranking in the Top 100 in countries as diverse as Israel and Iceland, Chile and Croatia. It is currently the Number 1 boys' name in France.
 Parents of Gabriels of varying ages include Mick Jagger and Jerry Hall, Daniel Day-Lewis and Isabelle Adjani, Jason Alexander, Meredith Vieira, and Mia Farrow.

Gabriel

Two prominent literary namesakes make Gregor a somewhat risky choice. On the highbrow side, there's Gregor Samsa, the Kafka character who woke up one day to find himself turned into a cockroach. And then there's Gregor Clegane, one of the most feared and purely evil characters in the world of Game of Thrones. It's a shame, because this earlier form of Gregory, quite common in Scotland, would otherwise make an attractive choice.

Gregor

Hugo, the Latin form of Hugh, has more heft and energy than the original -- and of course we love names that end (or begin, for that matter) with an o. This one is especially appealing because it's backed up by lots of solid history and European style.
 Hugo is one of those names that misses by a single year ranking in the Top 1000 for its entire history. It fell off the list in 1948, the height of post-WWII pro-American fervor, before heading back up.
 Hugh has held steady in the middle of the US Top 1000 for more than 40 years now, but we predict might be headed for the kind of popularity it enjoys in the rest of the English-speaking world and many European countries.
 Hugo ranks in or near the Top 100 in countries and cultures as diverse as Sweden and Spain, France and Finland. It's also a favorite boys' name on Nameberry, usually a harbinger of future success in the US as a whole.
 In the seventh Harry Potter novel, Ron and Hermione bestow the name Hugo on their son. Hugo Strange, meanwhile, is a longtime adversary of Batman. 
 Real-life Hugos include Hugo Chavez, the late president of Venezuela, and the fashion world's Hugo Boss. In the more distant past there was the distinguished Supreme Court Justice Hugo Black.
 Trivia tidbit: The annual awards for sci-fi writing are called the Hugos, honoring early genre writer Hugo Gernsback.

Hugo

The striking Ignatius is making a truly surprising comeback, sparked by its selection by not one but two celebrities — Cate Blanchett and Julianne Nicholson. With its fiery qualities and magical feel, Ignatius might just fit in with Blaze, Griffin, Ember, or Atticus.
 
While Ignatius is now associated with fire, it originally derived from the Ancient Etruscan Egnatius, a name of unknown meaning. The spelling was changed to make it closer to the sound-alike Latin word, ignis, and thus, the fire meaning was born.
 
The name of several saints including the founder of the Catholic Jesuit order, Ignatius was once reasonably well-used in the US, ranking in the Top 1000 in the early 20th century. Out of favor since 1930, it has been slowly trending upwards since the early 2000s, and as of 2023, it is given to around 90 boys each year.
 
Other notable bearers include: Charles Ignatius Sancho, a writer, abolitionist, composer, and the subject of a recent novel by Paterson James; Ignatius James, an Australian singer and producer; Ignatius Jones, a Fillipino-Australian rock singer and journalist; and Ignatius Ganago, a Cameroonian footballer. Writer of the Sherlock Holmes stories, Arthur Conan Doyle, also has Ignatius as a middle name. 
 
One big selling point of Ignatius is that despite its grandeur, it has several down-to-earth nicknames: Iggy, Nate, and Nash. Plus, the Spanish variation, Ignacio, is long-standing feature in the US Top 1000, so while Ignatius might be rare, its close relative is definitely not. 
 
Love Ignatius but can't quite commit to it? You could consider Indigo or Inigo with the nickname Iggy, or a similar-but-more-popular choice, like Azarius, Ozias, Ziggy, or Elias.

Ignatius

Jarvis, one of the original two-syllable nouveau boys' choices, is a saint's name with a certain retro charm and a nice quirky feel. Though Jarvis peaked in the late 1880s, he is beginning to sound fresh again.
 Jarvis Lorry is a character in Dickens's A Tale of Two Cities, and there was another Jarvis in Upton Sinclair's The Jungle. Probably the best known modern Jarvis is British rocker Jarvis Cocker.

Jarvis

Lennox is an aristocratic and powerful Scottish surname name made truly special by that final x. The worldwide fame of British boxer--World and Olympic champion--Lennox Claudius Lewis brought the name into the spotlight as a first name, while as a last it's tied to Eurythmics singer Annie L.
 The Thane of Lennox appears in Macbeth, Mary Lennox is in The Secret Garden and there are two Agatha Christie characters with the name.
 Lenox is another accepted spelling.

Lennox

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

Miles, which has a permanent veneer of cool thanks to jazz great Miles Davis, is a confident and polished boys' name that's an American classic. Always ranking in the US Top 1000, it's been drifting up the charts for the past half century but has never been TOO popular.
 
Miles is a favorite of celebrity baby namers, given to their sons by Elisabeth Shue, Mayim Bialik, Larenz Tate, Joan Cusack and Lionel Ritchie. It also makes a great honor name for all the Grandpa Michaels out there.
 Miles was the name of the first translator of the Bible into English--the English monk Miles Coverdale, which is also the name of a character in Hawthorne's The Blithedale Romance. Miles Hendon figures in Mark Twain's The Prince and the Pauper, and Miles was one of the young children in Henry James's The Turn of the Screw. Miles--or Myles--Standish was the leader of the Pilgrim fathers.
 Miles has also been a favorite movie and TV character name from the days of Murphy Brown to 24 and Avatar.

Miles

Oscar is one of the most stylish Old Man Names of our era. While it's softened slightly in popularity over the past 20 years, that may be considered a very good thing.
 
In the nineties and the aughties, Oscar looked to be one of the grandpa names heading straight for the top of the charts, ala Elijah or Theodore. But instead of rising into the Top 100, Oscar has settled into that comfortable place between being too far in or out.
 
Oscar has Irish and Norse roots—Norse Oscar comes from the Old English Osgar, a variation of the Old Norse name Ásgeirr. The Irish form was derived from the Gaelic elements os, meaning "deer," and car, "loving." In Irish legend, Oscar was one of the mightiest warriors of his generation, the son of Ossian and the grandson of Finn Mac Cumhaill (MacCool).
 
Oscar also has remarkable international versatility. In addition to being a top name in Sweden, where it has royal connection, Oscar ranks high on popularity lists in all the English-speaking countries as well as in France, Spain, Germany, the Netherlands, and other European and Latin American countries.
 
Actors Hugh Jackman and Gillian Anderson chose Oscar for their sons.Famous Oscars include Wilde (whose given name was Fingal), Isaac, Madison, Hammerstein, Peterson, de la Renta, the Academy Award, and the Grouch.

Oscar

Quentin, an offbeat name with lots of character, relates to the Latin for the number five and is by far the subtlest and most usable of the Latin birth-order names, masculine as well as stylish and distinctive. It was borne by a third-century saint and came to England with the Normans.
 Sir Walter Scott wrote the novel Quentin Durward in 1823, about a young, upper-class Scotsman, and Quentin Compson is both a male and a female character in William Faulkner's The Sound and the Fury. Real-life bearers include movie director Quentin Tarantino; eccentric British author Quentin Crisp (born Denis); and Quentin Blake, illustrator of Roald Dahl books. Theodore Roosevelt had a son named Quentin.
 Trivia tidbit: St. Quentin is the protector against coughs.

Quentin

There's Rhys and there's Reese (now more popular for girls) and there's Reece, and we particularly like the traditional Welsh spelling, which entered the list in 2004, possibly influenced by Jonathan Rhys Meyers, of The Tudors, and Welsh-born actor Rhys Ifans.
 Always widespread in Wales, where it has deep historic roots, Rhys is also a high-ranking name in England, Ireland and Scotland.
 Former New Kid on the Block Joey McIntyre named his son Rhys Edward in 2009.

Rhys

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

As unlikely as it may seem, Theodore is a hot new hit name, vaulting into the Top 10 in 2021 for the first time ever and rising three more points last year to rank at Number 7.

Friendly nickname Theo may be responsible for some of that, though there are plenty of baby boys given Theo as their full name too. Add their numbers together along with those for Mateo and Teo, and they hands-down become the Number 1 boys' name.

Theodore and Mateo are far from interchangeable names, for sure, and some Theodores are called Teddy....or Theodore. But we predict an overwhelming number of little boys called Theo or Teo on American playgrounds over the coming years.

Theodore is a derivative of the Latin Theodorus, a variation of the Greek name Theodōros. The components are from the Greek words theos, meaning "God," and dōron, meaning "gift," giving Theodore the meaning "God-given" or "gift of God." Names with similar origins include Theodora, Dorothy, and Dorothea.
 
When Theodore Roosevelt took office in 1901, the name Theodore was in the Top 40 <a href="https://nameberry.com/boys-names">boy names</a>, with Teds and Teddys everywhere. After some damaging stereotypes—the chubby Chipmunk Theodore and Beaver Cleaver's real name—Theodore went into a decline, from which it has definitely made a recovery, thanks in part to the popular and likable nickname Theo.
 Theodore has been the choice of several celebrities, including Ivanka Trump, Bryce Dallas Howard, Natascha McElhone, and Ali Larter, not to mention being the fictional son of Christian and Ana in Fifty Shades of Grey.
 The name has a distinguished history. In addition to being presidential, it was borne by novelist Dreiser, poet Roethke, and French painter Gericault, and it was the first name (spelled Theodor) of Dr. Seuss.
 Among the well-known Teds, baseball's Williams and musician Nugent were born Theodore, but Ted Turner was christened Robert, and Ted Kennedy and Ted Danson were originally Edward.
 The beloved character Laurie in Little Women was named Theodore Laurence.

Theodore

If you're tired of Oliver, you might consider this energetic three-syllable surname instead, so you could have a little Tolly instead of an Ollie.
 Tolliver is a not-too-obvious occupational Scottish surname dating back to the time of armor makers. Heard much more often as a surname, there have been Tollivers in soap operas like General Hospital and Cy Tolliver was a character on Deadwood; in real life, Melba Tolliver is a barrier-breaking African-American TV journalist.

Tolliver

Though to most Americans Viggo is a one-person name attached to intense actor Mortensen, it is actually an old Norse name dating back to the Vikings, and is currently the 32nd most popular appellation in Sweden. Viggo Mortensen is a Jr., sharing his name with his Danish father.
 
We think this name is so, well, vigorous, that it might appeal to others as well. Taylor and Natalie Hanson seemed to agree when they chose it for their fourth child.

Viggo

headintheclouds's list "Boys Favorites Rebooted" of 25 great name ideas: Alasdair - Viggo!