Caleb is an attractive Old Testament name that has been in the US Top 100 for nearly three decades now. Consistently popular but never too popular, Caleb feels more like a classic than a momentary trend.
 Caleb has two potential derivations, the first being from the Hebrew kelev, meaning "dog," and the second from the Hebrew components kal and lev, together meaning "whole heart." 
 
In the Old Testament Caleb is one of only two ancient Israelites (Joshua was the other) who set out from Egypt to finally enter the promised land. 
 
Caleb Garth is a character in George Eliot's Middlemarch. Caleb was the full name of James Dean's character Cal in East of Eden, and the name has also been heard on Desperate Housewives and Buffy the Vampire Slayer.Julianne Moore chose Caleb for her son, as did Bo Bice. The shortform Cale is also rising in popularity, and the current Kaleb spelling picks up on the K-to-C initial trend.

Caleb

Camden is a surprise hit, probably as a result of some star baby cred: it has been chosen by no less than four celebrity parents since 2012. Camden is a Jersey Boy name, along with equally popular Trenton -- these are two cases where the names are more attractive than the places that inspired them.
 Camden Town is a hip area of London, noted for its busy open-air market.

Camden

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.

Ezra has a lot going for it: the strength of its heroic Biblical legacy, its quirky sound, and its fresh but familiar feel. Ezra is now at its highest point ever, but its intuitive streamlined spelling and deep roots could make it a worth successor to Elijah in the Top 10 -- or even to Liam or Noah at Number 1.
 Ezra just misses being among the elite group of male names that's always been in the US Top 1000, having dipped below the cutoff in 1964 and '67. Ezra also makes the Top 100 for boys in other English-speaking countries along with the Netherlands.
 Ezra is an abbreviation for the Hebrew phrase Azaryahu, meaning "Yah helps". In the bible, Ezra led a group of fifteen hundred Israelites out of slavery in Babylon and back to Jerusalem. 
 
Other notable Ezras include poet Ezra Pound and New York Times political columnist Ezra Klein. Ezra Cornell was a founder of Western Union and co-founder of the university that bears his name and Ezra Jack Keats is a popular children's book author-illustrator. 
 Both Paul Reiser and Taylor Hanson are dads to boys named Ezra, and there are Ezras to be found in Wilkie Collins's The Moonstone and Daniel Deronda by George Eliot.
 And let's not forget the band—Better Than Ezra—along with rising actor Ezra Miller, Vampire Weekend musician Ezra Koenig or the character Ezra Fitz from Pretty Little Liars.
 As unlikely as it may seem, Ezra is also growing in popularity as a girls' name, making the girls' Top 1000 in 2018 ad still rising. About 450 baby girls were named Ezra last year, but about 8000 baby boys, which puts Ezra below our 10% minimum to be considered a unisex name.

Ezra

Gavin, a name with Scottish roots, has stepped into the spotlight, replacing the dated Kevin, thanks in part to pop-rock sensation Gavin DeGraw and Bush lead singer Gavin Rossdale. 
 Gavin also has made literary appearances in J.M. Barrie's The Little Minister and in William Faulkner's Snopes family trilogy. In the form Gawain, he was one of the Knights of King Arthur's Round Table.
 Gavin entered the ranks in the 1950's and climbed as high as Number 30, in 2008, before dropping a bit on the charts.

Gavin

Griffin is one of the newer and most appealing of the two-syllable Celtic surnames. In English, griffin is the name of a mythological creature, half eagle, half lion. It re-entered the list in 1983 after an absence of 75+ years.
 Brendan Fraser, Teri Polo and Joey McIntyre all chose Griffin for their sons. Actor Griffin Dunne's mother's maiden name was Griffin. Another well-known bearer was Griffin Bell, Jimmy Carter's Attorney General.
 Also worth considering: the original classic Welsh Gruffudd (dd=th).

Griffin

Jasper originated as a variation of the Latin Gaspar, which ultimately derived from the Persian word ganzabara, meaning "bringer of treasure." As a given name, Jasper’s etymology is unrelated to that of the gemstone, which comes from a Semitic word meaning "speckled stone." Jasper is the usual English form for one of the Three Wise Men who brought gifts to the infant Christ according to medieval tradition and appears in the Bible as a reference to the stone itself in Revelations 4:3.
 
Jasper has a lot going for it—it's been rocketing up the ranks in the US, after long being considered a posh and charming name in England. Distinctly masculine, Jasper represents a variety of quartz—one of the few gem <a href="https://nameberry.com/boys-names">names for boys</a>—and is the first name of the great modern artist Jasper Johns. Our only caveat: Jasper is a favorite of a lot of hip parents, and has gotten even more popular since its strong appearance in the Twilight books and movies.
 Jasper has considerable literary cred as well, appearing in works by Sir Walter Scott, James Fenimore Cooper, Thackeray, and Thomas Hardy--as well as Stephenie Meyer. 
 Casper/Caspar is the German version.

Jasper

This one-time trendy form of Jeremiah hovered just outside the Top 25 throughout the 1970s and 80s.
 Scout's brother Jem in To Kill a Mockingbird was christened Jeremy Atticus Finch, Jem being a very appealing nickname. Jeremy Piven and Jeremy Renner are two current bearers.

Jeremy

Jonah, the name of the Old Testament prophet who was swallowed by the whale, only to emerge unharmed three days later, is increasingly appreciated by parents looking for a biblical name less common than Jacob or Joshua, yet not too obscure. Plus, Jonah comes with a ready-made nursery-decorating motif.
 The appealing Jonah has been featured in such movies as Sleepless in Seattle and Knocked Up and is currently represented by actor/writer Jonah Hill.
 Jonas is the Greek version and Yona is a female spin.

Jonah

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.

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

Liam is the top boys' name in the US, holding the Number 1 spot for the past five years and also ranking as one of the most popular boys' names around the western world.
 Liam originated as a short form of Uilliam, the Irish variation of William. William is an English name from Germanic roots that was brought to Ireland when the British fled England following the Norman Conquest. The Irish began using English names, including William, which led to the development of Uilliam and its short form, Liam.
 Internationally, Liam is enjoying great popularity not only in the U.S. and its native Ireland, but in countries as diverse as Italy and Israel, Chile and Croatia. If you're looking for a boys' name that will easily translate across many languages and cultures, you can't do better than Liam.
 Irish-born actor Liam Neeson was instrumental in driving Liam up the charts, as was former Oasis member Liam (born William) Gallagher, and, more recently, One Direction member Liam Payne. Celebrities who have chosen Liam for their sons include Tori Spelling, Calista Flockhart, Rod Stewart, Kevin Costner and Craig Ferguson.
 Jaunty and richly textured, Liam holds solidly to the title of most popular boys' name starting with the letter L.

Liam

The related Lucas and Luke are both hugely popular boy names in the US and internationally, and now Luca has joined them on boys' popularity lists around the world.

That's an astonishing success story for a name that was virtually unknown a generation ago. Only 13 baby boys were named Luca in the US in 1980, and by 1990 it was still only 32. But by the turn of the century, Luca took off and has now surpassed his more familiar brother Luke in the US.

Boy names ending in vowel sounds may have felt too feminine to early generations who lived by more conventional gender rules. And that old school he-man America also may have rejected names like Luca for being too "foreign". But in this era of Noah and Mateo, Elijah and Ezra, Luca has finally found widespread acceptance.
Along with its popularity in the US, Luca ranks highly in a range of countries that speak English, Spanish, French, and German, among others. While Luca is technically related to Luke and Lucas and so takes their ancient Roman habitational meaning, you might also see it as a relative of Lucius or Lucian, meaning light.
 Colin Firth and his Italian wife chose Luca for one of their sons, as did Hilary Duff, Vincent d'Onofrio, Rebecca Minkoff, and Jacinda Barrett and Gabriel Macht.

Luca

Simple and universal, Marco is a Latin classic that would make a much livelier namesake for an Uncle Mark. It was used for her son by actress Jill Hennessy and goes well with surnames of any nationality.
 Marco, related to the Roman god Mars, has long been associated with Marco Polo, the thirteenth century Venetian merchant-traveler who was instrumental in introducing Europeans to Asian culture. Eugene O'Neill wrote a play called Marco Millions, based on the life of Marco Polo.
 More recent noteworthy Marcos are Marco Andretti, Indy race car driver grandson of the legendary Mario, and Marco Rubio, Florida senator. The name can also be found in two early Dr. Seuss books.

Marco

Mercer is an attractive possibility which is an occupational name that doesn't sound like one. Mercer and its cool, sophisticated short form Merce project a super creative image via their artistic namesakes.
 Johnny Mercer was a talented and charming songwriter-singer who wrote the lyrics for more than 1,500 songs, including Moon River. Jazz great Duke Ellington named his son Mercer, and he in turn became a respected musician in his own right. Stone Temple Pilot's Scott Weiland used Mercer as the middle name of his son Noah.
 In the visual arts, Mercer Mayer is a prolific children's book writer and illustrator.
 The short form Merce is associated with avant garde dancer/choreographer Merce Cunningham, born Mercier, whose name still resonates with an aura of bold originality.

Mercer

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

Mycah

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

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

Rémy

A name with some sterling qualities, most associated with the British currency and silver markets. Sterling has several recent TV associations, with characters Roger Sterling (on Mad Men) and Sterling Archer (on Archer), and actor Sterling K. Brown (on This is Us).

Sterling

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

rileymc1234's list "Handsome, Whimsical Boys Names" of 22 great name ideas: Caleb - Theo!

Handsome, Whimsical Boys Names

I like handsome, whimsical boys names that are uncommon, but not weird. 