Cairo is an exciting place name possibility with upbeat o ending. It debuted in the US Top 1000 in 2015 and keeps heading upward.

Cairo owes its sudden popularity to its choice by rapper Tyga for his son King Cairo's middle name. And Brazilian place kicker Cairo Santos helped popularize the name when he joined the Chicago Bears football team. Santos is named for his father, also Cairo.

Another influence propelling Cairo up the ladder: the popularity of the name Kai. And Cai could certainly be a nickname for Cairo.

Cairo

With its sharp, succinct sounds and cool, laidback style, Eli is a popular choice among parents today. Compact and punchy, it is a Biblical name with plenty of charm. 
Derived from the Hebrew ’aly, the name Eli means “high” or “ascended.” In the Old Testament, Eli was a high priest of the Israelites, who trained and gave guidance to the prophet Samuel. 
While the Biblical Eli suffered an unhappy end due to his sons’ misdeeds, his name hasn’t shared the same fate. Used since the 17th century, Eli has never been out of the US Top 1000. It has featured in the Top 100 for the last decade, and is currently popular in the UK, Australia, New Zealand, and The Netherlands too. 
Eli is also used as a shortened form of Elijah, Elias, Eliezer, or even Elliot and in some Scandinavian countries, is it used as a feminine name, most often as a nickname for Elisabet or Elin. With its unisex potential and its longer forms ranking highly, Eli might feel more popular than it actually is. 
Notable namesakes include Eli Whitney, the inventor of the cotton gin, Eli Long, a Civil War general, and Eli Roth, a film director, screenwriter, and actor. Enjoyed by the general public and celebrities alike, Eli has been chosen by CNN anchor Campbell Brown, SNL alum Rachel Dratch, and actor Kevin Weisman. 
Spirited but solid, no-fuss Eli is given to over 4000 boys each year, so you wouldn’t be alone in loving the name. If you don’t want your baby to have share however, you could consider other Biblical E names such as Eben, Elim, Enosh, or Eran, or perhaps other 3 letter gems, like Ira, Ari, Jem, Nye, or Ivo.

Strong, charismatic, and sleek, Elias has followed in the footsteps of Elijah and Eli to become a popular choice among parents today. 
While it may sound cool and fresh, Elias is a name with history and substance. It is the Greek form of the name Elijah, meaning “Yahweh is God,” and was used in both the Greek New Testament and medieval tales. Elias was then given to early saints, to honor the miracles and work of the popular Biblical figure. 
Revived by Puritans in the 18th century, notable namesakes include the inventor of the sewing machine, Elias Howe, writer Elias Canetti and Walter Elias Disney. 
Felix Mendelssohn composed a popular oratorio named “Elias”, while Sir Walter Scott, Anthony Trollope, and Thomas Hardy all have characters called Elias in their novels, giving the name literary and classical charm. 
In the US, Elias has seen significant usage from the 90’s onwards with its popularity doubling during the 2010’s. Given to over 6000 boys each year, Elias continues to climb the charts and has overtaken Eli as a go to El- choice. 
While still outranked by Elijah in the US, across Europe and South America, Elias is the preferred form. Popular in Sweden, Germany, Switzerland, Uruguay, and Mexico, Elias travels well. 
The name has been chosen for characters in the popular horror podcast, The Magnus Archives, Cassandra Clare’s trilogy “The Infernal Devices”, and the TV series “Person of Interest.” Elias has the celebrity seal of approval too, with singer Michael Bublé, actor Robert Downey Jr, tennis player Boris Becker and actress Barbara Becker choosing to use it for their sons. 
Handsome and refined as it is, the main problem with Elias is deciding whether you want to use it, or keep Elijah, Eli, Elliot, Elio, Eliza, Elizabeth, or Elise in the running. To avoid the problem, you could go with similar but lower ranking Tobias, Linus, or Ozias.

Elias

The Top 10 boys' name Elijah is derived from the Hebrew name Eliyahu, composed of the elements ’el and yah, both of which refer to God. In the Old Testament, Elijah was the prophet who went to heaven in a chariot of fire, a story sure to inspire any young Elijah.
 Like many biblical patriarch names, Elijah was on a long downward slide from the 19th century until the late 1960s, when it reversed course and headed uphill. Elijah was rejuvenated when Cher and Greg Allman bestowed it on their son Elijah Blue in 1976, and got another shot of youth serum via young actor Elijah Wood.
 Among other celebrities who have chosen Elijah for their boys are Donnie Wahlberg, James Spader, Tracy Nelson, Wynonna Judd and Bono (who followed it with <a href="https://nameberry.com/list/673/middle-names">middle names</a> Bob Patricus Guggi G.).
 Elijah figures in the Jewish, Christian and Muslim religions. There are numerous songs containing the name, and Elijah is also a character in many films and books—including Charles Dickens's Martin Chuzzlewit.
 Elias is the related, Greek variation of Elijah, also quite popular. Eli is a separate, unrelated name, though sometimes used as a short form of both Elijah and Elias.

Elijah

Isaac has shaved off his biblical beard and leaped into the upper echelon of popular boys' names, outrunning cousin Isaiah. A favorite of the Puritans, Isaac has never dipped below Number 400 on the US list of top boy names.
 Isaac evolved from the name Yitzchaq, derived from the Hebrew word tzachaq, meaning "to laugh." In the Old Testament, Isaac was the long-awaited son of the elderly Sarah and 100-year-old Abraham, so old that their news provoked laughter, giving the name its meaning. Isaac is used as a given name among Jews, Christians, and Muslims alike.
 
A baby given this name can point to many distinguished namesakes, including Isaacs (and Izaaks) Newton, Walton, Bashevis Singer, Asimov, Stern, Hayes, and Hanson.
 
Isaac also boasts the cute nicknames of Izzy — now shared, however, with a bevy of Isabellas — and Ike.

Isaac

Isaiah, like brethren Isaac and Elijah, is a once neglected biblical name now firmly back in favor, already surpassing such long-popular Old Testament stalwarts as Aaron and Adam. Isaiah has ranked on the US Top 1000 list for boys every year but two, 1969 and 1970.
 Isaiah derives from the Hebrew Yesha’yahu, containing the elements yasha’, meaning "to save," and yah, in reference to the Hebrew god. The biblical Isaiah, son of Amos, was the most important of the major prophets, with an Old Testament book named for him. He prophesied that the Children of Israel would be exiled from their homeland, but that God would bring the back.
 
Isaiah has been a star player on the contemporary athletic field, with several prominent basketball and football player namesakes, in addition to a memorable character on Little House on the Prairie, and Grey's Anatomy actor Isaiah Washington.
 Beyond that, two sports figures have named their sons Isaiah: Allen Iverson and Tim (and wife Elisabeth) Hasselbeck. Basketball superstar Isiah Thomas helped popularize that streamlined spelling of the name.

Isaiah

Though some might find it a bit heavy-booted, Ivan is one of the few Russian boys' names to become fully accepted into the American naming pool.
Ivan is, of course, ubiquitous in Russian culture. There is one of the brothers in The Brothers Karamazov, the protagonists of Tolstoy's The Death of Ivan Ilyich, and Solzhenitsyn's One Day in the Life of Ivan Denisovich, and the title character in Chekhov's Uncle Vanya. Real life Ivans include writer Turgnenev, biologist Pavlov, tennis player Lendl, and rulers Ivan the Great and --oops--Ivan the Terrible. Vanya is his warm and appealing nickname.

Ivan

Jeremiah is a solid Old Testament prophet name that has gradually taken the place of the now dated Jeremy, Gerard and Gerald, joining other currently popular biblical 'iah' names like Josiah and Isaiah. In the Bible Jeremiah is a famous prophet whose story is recorded in the book named after him.
 Dickens used the name in two of his novels--Little Dorrit and A Tale of Two Cities-- and other fictional Jeremiahs have been spotted in such movies and TV shows as Oz, Zoey101 and The Princess Diaries. Leonard Bernstein composed a work called Jeremiah Symphony.
 Caveats: Once-logical nickname Jerry sounds like the family dentist, and some may make the Jeremiah bullfrog association.
 A related, more unusual biblical option: Jeriah.

Jeremiah

Josiah—a biblical name with lots of quaint, old-fashioned charm—makes a much fresher sounding alternative to either Joseph or Joshua, combining the best of both. Josiah is among the several Biblical boys' names that have been on the rise this decade.
 Josiah is derived from Yoshiyahu, a Hebrew name from the components yoshi, meaning "support," and Yahu, referring to the Hebrew god. 
 
In the Old Testament, Josiah was an upright king of Judah from the age of eight, after his father Amon was murdered. Josias is a related Latin variation that is found in some biblical translations.
 
Two Josiahs, Wedgwood and Spode, founded the fine English potteries that bear their names. Josiah Bartlett was a signer of the Declaration of Independence, and the President on The West Wing shared his name, being a fictional descendant. 
 Charles Dickens used the name for a character in his novel Hard Times and Josiah Borden is a character in Eugene O'Neill's tragedy Mourning Becomes Electra.

Josiah

Kaiser, as in roll and Wilhelm, appeared for the first time on the US Top 1000 in 2017.  It fits the two-syllable -er ending style that's all the rage, and it lends itself to the short form Kai.  But we hope this Germanic version of what is essentially a title rather than a name doesn't keep rising on the charts.

Kaiser

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

Levi, lighter and more energetic than most biblical names, with its up vowel ending, combines Old Testament gravitas with the casual flair associated with Levi Strauss jeans. 
 Now it's being rediscovered in a major way—Levi has been shooting up the charts in recent years. Extremely popular in the US, it's also a Top 100 name throughout the English-speaking world as well as in a diverse range of countries from Germany to Brazil.
 
In the Old Testament, Levi was the third son of Leah and Jacob, from whom the priestly tribe of Levites descended; in the New Testament, Levi was Matthew's given name before he became an apostle. It is suspected that Levi derives from the Hebrew word yillaweh, meaning "he will join." 
 Levi received a lot of attention as the sons of Matthew McConaughey, Sheryl Crow and Sara Gilbert.
 In the Thomas Hardy novel Far from the Madding Crowd, Levi Everdene is the father of the heroine. 
 <br/
Levon is a related name.

Levi

An Old Testament name with a Gaelic lilt, Malachi entered the list in 1987.
 In the Bible, Malachi (pronounced with the final syllable as EYE), was the last of the twelve Hebrew prophets, who foretold the coming of Christ. 
 In Anthony Trollope's Phineas Finn, Malachi is the name of the hero's father, and in James Joyce's Ulysses, Malachi Mulligan is a medical student. The lighter-hearted Irish version is usually spelled Malachy.

Malachi

Matthias is the ancient Biblical form of Matthew, widely used along with brother Mathias in the US for the past 20 years.

This New Testament name -- he was chosen to replace Judas Iscariot as an Apostle -- is found in several European languages and cultures. In every language from Scandinavia to France to Spain, the name is pronounced ma-TEE-us, but in the US it might be pronounced with a long I in the middle -- ma-TYE-us.

Mathias

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

Milo is most commonly considered to be Germanic name derived from the Latin word miles, meaning "soldier." However, there is evidence to suggest it also may have independently spawned from the Slavic root milu, meaning "merciful." Milo predates brother name Miles, a variation that evolved when the name immigrated to the British Isles in the Middle Ages. Mylo is an alternate spelling.
 
Milo has long been a favorite <a href="https://nameberry.com/boys-names">boys' name</a> on Nameberry, also getting some well-deserved appreciation in the wider world. Milo combines the strength of the ancient Greek Olympic wrestler of that name—a six-time winner of the Olympic games—with the debonair charm of a WWII RAF pilot.
 More recently, Milo has been associated with the dashing Milo Ventimiglia of This Is Us fame, and it has also been the name of characters in books Catch-22 and The Phantom Tollbooth, and on screen in Milo and Otis, Alias, and Atlantis: The Lost Empire.
 Ricki Lake, Camryn Manheim, Sherry Stringfield, Liv Tyler, Craig Ferguson, and Alyssa Milano are six celebrity parents who share our enthusiasm for Milo, as do many Nameberry baby namers.
 Milo is often heard in Ireland. Milo O'Shea was a renowned Irish character actor.

Milo

Orion is a rising star, with both mythical and celestial overtones.
 The Greek mythological Orion was the legendary hunter who pursued the seven daughters of Atlas, was slain by the goddess Artemis, and then placed as one of the brightest constellations in the night sky by Zeus.
 Mark Twain had a brother named Orion, and Chris "Big" Noth picked the name for his son. It is also a Harry Potter name.
 Orion's Gaelic connection to O'Ryan/Ryan makes it familiar as well as unusual.

Orion

Riley -- one of the most <a href="https://nameberry.com/popular-names/unisex">popular unisex names</a> -- is trendier now for girls though for boys it's a classic, ALWAYS ranking in the US Top 1000. 

In fact, after a decade of softening, Riley has recently taken a turn upward for boys, along with a lot of other gender-neutral names. These days, parents are embracing unisex names even more enthusiastically for their sons than for their daughters.

Riley ranks in the Top 100 for boys throughout the rest of the English-speaking world, though interestingly not in its native Ireland. In the US, Riley is the most popular <a href="https://nameberry.com/list/753/best-irish-girl-names">Irish name for girls</a>.

There are lots of athletes and other notable real-life namesakes for a boy named Riley, as well as fictional ones in Buffy the Vampire Slayer and Twilight: Eclipse. And Riley can easily be shortened for a boy to Ry or Lee.

Riley

Sleek and smart, with a hint of mystique about it, Silas is a recent addition to the US Top 100. Both mythological and Biblical in origin, Silas joins the ranks of Isaiah, Atlas, Elias, and Sebastian: polished and contemporary feeling names with plenty of history. 
The origins of Silas are debated or perhaps multiple. On one hand, it could a simplified form of the Latin Silvanus, meaning “of the forest.” 
In Roman mythology, Silvanus was the god of trees, and his name was originally bestowed on those who lived in forested areas or who worked with wood. This could bring either a hardy, outdoorsy ruggedness to the name or something more mystical, dark, and intriguing. 
On the other hand, Silas could be a Greek form of the Aramaic Seila or of the Hebrew Saul, meaning “asked for” or “prayed for”. 
Its Biblical roots can then be traced to either Saul, the first King of Israel, or to a companion of Paul the Apostle. Later venerated as a saint, Silas was a leading member of the early Christian community, who accompanied Paul on his second missionary journey. 
Given as an English name from the 17th century onwards, Silas has a rich literary history. Notably used by George Eliot in Silas Marner and by Dan Brown in The Da Vinci Code, Sheridan Le Fanu, Charles Dickens, Robert Frost, Willaim D. Howell, Neil Gaiman, and Mark Twain have also featured a Silas in their work. 
A longstanding favorite and <a href=“https://nameberry.com/popular-names/nameberry/boys”>one of the most searched names on Nameberry</a>, in the ‘real world’, Silas had mostly lingered towards the lower end of the US Top 1000 in the 20th century. 
It did gain some attention in the Netherlands, Denmark, and Switzerland in the 2000’s, but it took until the 2010’s for it to make significant moves in the US. Now, it is trending upwards and given to nearly 4000 babies each year. 
Based on its Nameberry popularity, its status as ancient but still fresh, and its similarity in sound or style to popular Elijah, Isaac, Lucas, and Samuel, Silas could continue to climb the charts. 
If you love it, but don’t want to be part of the crowd, you could consider one of Silas’s relatives, such as Sylvan, Sylvester, or Sylvius; alternatively, Linus, Rufus, Caius, Laurence, or Ozias might appeal as less popular options.

Silas

Simon is pure and simple (not in the nursery rhyme sense), and an appealingly genuine Old and New Testament name that's not overused – making Simon a stylish choice. In the Bible, Simon was the second son of Jacob and Leah and the original name of Saint Peter, as well as the name of several New Testament figures. Historically, Simon Bolivar is known as The Liberator of Latin America.
 

The New Testament spelling of Simon (rather than Simeon) was probably influenced by the unrelated Greek name Simon, meaning "flat-nosed". The Hebrew Shim'on or Simeon means "He has heard". Later, it was also conflated with the Old English name Sigemund ("victory-protection") — so there's an element of several origins and meanings in the name.

 Simon was one of the more appealing characters in Lord of the Flies, then became part of the British invasion of names that hit U.S. shores along with the Beatles. Other recent notable Simons include Simon Templar, aka The Saint; Simon Cowell, snarky judge on The X Factor; Simon Le Bon, lead singer of Duran Duran; and Simon Baker, Australian-born star of The Mentalist. 

 Simon is currently very popular in several European countries, including Austria, Denmark, France, Sweden, Switzerland and Belgium.

Simon

Tobias is one of a number of s-ending <a href="https://nameberry.com/boys-names">boys' names</a> that are riding a wave of popularity. With its Old Testament-Dickensian feel, it's a name with a distinguished pedigree. 
Tobias is the Greek form of the Hebrew Tobiah, which was derived from the name Toviyah. Toviyah was created from the elements tov, meaning "good" and yah, representing the Hebrew God. Tobias is the name of several biblical figures but is primarily associated with the story of Tobias and the Angel.
 A contemporary bearer is Tobias Wolff, author of A Boy's Life. Tobias Smollett was a major eighteenth century Scottish novelist. Tobias Snape, meanwhile, is a Harry Potter character.
 
The short form Toby has a life of its own, used independently at least as far back as Shakespeare's time, with Sir Toby Belch in Twelfth Night. Toby also was the name of a character on The West Wing. Actor Tobey Maguire was born Tobias and named his son Otis Tobias.
 
There is also the rarely used but still viable daddy of them all --Tobiah, the name of a rebel Hebrew king

Tobias

Wild

New to the US Top 1000 in 2015, Wilder is on many parents' possibility lists, one of the new generation of bad boy names growing in popularity. Wilder got a big boost in interest through Goldie Hawn's grandson, born in 2007, via son Oliver.
 Wilder is more familiar as a surname, borne by such notables as authors Laura Ingalls and Thornton, composer Alec, director Billy, and actor Gene. Douglas Wilder was the first African American to be elected Governor of Virginia. Wilder was one of the 10 fastest-rising boys' names of 2016 and is on its way to becoming one of the hottest <a href="https://nameberry.com/search/boys-names/w">baby names starting with W</a>.

Wilder

Zion has taken off in recent years, especially after singer Lauryn Hill used it for her son in 1997 and incorporated the name into a hit song. It combines a user-friendly Ryan-Brian sound with the gravitas of religious significance. The Hebrew pronunciation is 'tzeeyon'.
 In the Old Testament, the name Zion frequently refers to the city of Jerusalem as a whole, and came to be symbolic of Jewish national aspirations, and thus was the source of the term Zionism.

Zion

brenlo's list "Boy Names with Long I Sounds" of 24 great name ideas: Cairo - Zion!

Boy Names with Long I Sounds

Boy names in the top 500 range which contain an I which has a long-I sound when pronounced.