Adriano is a dashing Italian name which gets around the possible gender confusion of Adrian.

Adriano

Aiko is a very common Japanese name with a lovely meaning that is rarely heard outside the Asian community.

Aiko

Softer and smoother than Alexander, this classic <a href="https://nameberry.com/baby-names/496/spanish-names-for-boys">Spanish name for boys</a> has made a seamless transition to this culture. Adding to its current impact: the Lady Gaga song Alejandro .

Alejandro

With mythological names rising, the handsome son of Zeus and god of medicine, music, and poetry among many other things might offer an interesting, if high-pressure, option. 
 
But if Romeo and Venus are now deemed baby-appropriate, why not Apollo? Olympic speed skater Apolo Anton Ohno might inspire some parents. And now that it's been chosen by Gwen Stefani and Gavin Rossdale, it could take off as their first son's name—Kingston—has.
 Other cool associations include NASA's Apollo program, from 1961-72, that succeeded in putting the first humans on the moon when astronauts Neil Armstrong and Buzz Aldrin landed their lunar module and walked on the moon's surface. There's also the historic Apollo Theatre in Harlem, on whose stage the careers of Billie Holiday, Ella Fitzgerald, Artetha Franklin, Stevie Wonder, the Supremes, the Jackson 5, and countless others were launched.

Apollo

Quirky cool Arlo is now well and truly back. Last year it broke into the US Top 200 boy names and consistently ranks among the most popular boy names on Nameberry. 
 Arlo is even more popular in the UK, Australia and New Zealand. Arlo is also one of the top baby names among Nameberry's visitors from leading US cities.

 
Once strongly associated with shaggy singer Arlo Guthrie, Arlo has an animated and cheery feel, thanks to its upbeat o ending. It was chosen by Toni Colette for her son in 2011, which brought the name back into the spotlight. Previously, Arlo was in regular use in the first half of the twentieth century—it was Number 667 in 1915, for example, but it had dropped off the charts in 1944.
 Arlo has many possible derivations along with its Irish and English roots. It may be a shortened form of the Italian name Carlo or the Spanish Carlos, and in Basque-speaking regions it is the word for area. In English, Arlo was used as a place name, Arlo Hill, by Edmund Spenser in his epic poem The Faerie Queene and is thought to derive from the Celtic word Aherlow, meaning "between two highlands."

 A growing number of girls are also named Arlo in the US each year, with a handful more babies of both sexes receiving the Arlow and Arlowe spellings, which take this name more into smart surname territory.

Arlo

Armando takes the flat-footed Herman and makes it romantic.  This is another of the Latin names we expect to be seeing more of. 

Armando

Aurelio is an energetic Italian name rarely heard here, with an attractive aura. As the female version Aurelia gains greater notice, we expect to hear more from Aurelio too. In fact, Aurelio has recently entered the Top 1000 in the US in 2022. Next to follow might be latinate versions Aurelius and Aurelian.

Aurelio

Beau suggests someone devilishly handsome, with a large measure of southern charm—a nice image to bestow on your boy. Often solely a nickname in the past, it's now standing firmly on its own. Beau has been on the Social Security list non-stop since 1969.
 Beau also has something of a dapper image, thanks to the fashionable Beau Brummell (born George), which led to the stylish New York mayor Jimmy Walker being called Beau James. Other notable Beaus had more formal names at birth—Beaus Bridges and Biden were both the third sons in their families to carry their fathers' names: Lloyd Vernet Bridges III and Joseph Robinette Biden III.
 P.C. Wren's novel Beau Geste was a major bestseller in its day and was also a popular movie—in that case Michael was the character's birth name. Many will remember that the child of Ashley and Melanie Wilkes in Gone With the Wind was called Beau, and there was also a Beau on the old TV western Maverick.
 And if you want a more substantial name on the birth certificate, try Beauregard.
 Art Garfunkel, Emma Bunton, Wendy Wilson, Jamie-Lynn Sigler, and now Tori Spelling all have sons named Beau.

Beau

Benno is a cool name in its own right -- there was a tenth century Saint Benno -- though it is also used as a lively nickname for Benjamin. Saint Benno of Meissen is the patron saint of anglers and weavers and, strangely enough, alliteration.
 Benno came to attention in the U.S. via the father and son duo of Benno Schmidt Sr. and Jr. Senior was the venture capitalist who invented the term venture capitalist and Junior was the president of Yale University. Benno is also the appellation of a student character in Umberto Eco's The Name of the Rose.

Benno

Best known as one of the moons of Jupiter, Callisto was a nymph coveted by Zeus who was turned into a bear by Hera, becoming the Great Bear (Ursa Major) constellation.

Callisto

This hyper-rhythmic name has two evocative references. In Greek mythology, she was an island nymph, a daughter of Atlas, who delayed Odysseus from returning home. It is also a genre of West Indian music, originating in Trinidad and Tobago and largely popularized in the States by Harry Belafonte. 
 Calypso was the name of Jacques-Yves Cousteau's research ship--and would make a highly dramatic, musical choice.

Calypso

This evocative term for a stone or shell carved in relief could make a striking first name for a girl, though she would have a starring role in her story, rather than a cameo. 

Cameo

Cleo, one of the few girls' names to boast the cool-yet-lively o ending, is of course short for Cleopatra, the name of one of the most powerful women in history.
 Cleo was most popular in the early decades of the twentieth century--when it was also used for boys. The opening of the Egyptian tombs along with the 1917 silent film starring Theda Bara popularized a range of now-obscure Cleopatra diminutives, including Cleora, and Cleola. 
 A distinguished bearer is the British jazz singer Cleo Laine, and there have been Cleos on two TV dramas: ER and Law & Order: Special Victims Unit.
Maybe the fact that Cleo was recently chosen by Friends' David Schwimmer will ignite a welcome revival.
 Sound-alike Clio is the name of the ancient Greek mythological muse of history and heroic poetry, one that is rich with modern charm and would also make an intriguing choice,

Cleo

We all heard it on Seinfeld as the long-concealed first name of Kramer, then considered a punchline. Now some pioneering parents are embracing this expansive Greek name, which makes a creative and cool choice for a baby. Influential celebrity couple Scarlett Johansson and Colin Jost chose it for their son, born in 2021, which will likely drive Cosmo up in popularity. In the UK, it currently ranks within the Top 1000 boy names and is trending upwards.

 In literature, Baron Cosmo Bradwardine is a character in Sir Walter Scott's novel Waverly and Cosmo Topper is the befuddled banker in Thorne Smith's humorous novel Topper. In modern times Cosmo has become the short form for Cosmopolitan – both the magazine and the cocktail. And for those wishing to honor a medic in the family, Cosmo is also the name of the Arabian-born patron saint of doctors.

Cosmo

One of those ultimate cool-girl names, played by Keira Knightley in a movie about a supermodel-turned-bounty hunter, but kids might associate it with the game. High profile British designer India Hicks used it for her daughter. As a <a href="https://nameberry.com/girl-names">girls' name</a>it's still very rare, used in 2015 in the US for only seven baby girls.

Domino

The name of the great Italian Renaissance sculptor known as Donatello (but born DONATO), is one that could easily emigrate to modern America, just like sister DONATELLA.

Donatello

Echo, the pretty, resonant name of a legendary nymph, was the heroine of Joss Whedon's sci-fi series Dollhouse. Nick Hexum, of the band 311, named his daughter Echo Love.
 In the Greek myth, Echo was a nymph whose unrequited love for Narcissus caused her to fade away until all that was left was the sound of her voice. Obviously, a name with a lot of reverberations.

Echo

Jean Harlow (born Harlean Carpenter), the original platinum blonde bombshell, was a symbol of 1930s glamour, a factor that first Patricia Arquette and then Nicole Richie and Joel Madden probably had in mind when they gave their daughters the distinctive surname name Harlow. 
 It hit the Top 1000 for the first time in 2009, one year after the arrival of Ms. Madden. Harlow would fit right in with contemporaries Arlo and Marlow(e).

Harlow

A traditional possibility for a Japanese or Japanese-American child born in April or May. 

Haruko

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

Iago, the villain of Shakespeare's Othello, was so treacherously evil that his name has hardly ever been heard offstage. Try the much-more-benign Inigo.

Iago

Inigo, almost unknown in the U.S., is an intriguing choice, with its strong beat, creative and evocative sound, and associations with the great early British architect and stage designer Inigo Jones. The sixteenth-seventeenth century Jones shared his name with his father, a London clockmaker, who received it when <a href="https://nameberry.com/baby-names/496/spanish-names-for-boys">Spanish names for boys</a> were fashionable in England, especially among devout Roman Catholics.
 Inigo Montoya is a character in The Princess Bride, played by Mandy Patinkin.
 The pronunciation is with short i's and a hard g: IN-ih-go.

Inigo

Ivo is an unusual, catchy name with the energetic impact of all names ending in 'o'. Hardly heard in the U.S., it is used a bit more frequently in England, as is the related Ivor, a favorite of such novelists as Evelyn Waugh and P.G. Wodehouse. Ivo is currently most popular in the Netherlands.

Juno is an ancient name that feels as fresh as if it had been minted &mdash; well, not yesterday, but in 2007. Since the release of the popular indie film Juno, this lively but strong o-ending Roman goddess name has become more and more prominent as a potential baby name &mdash; Coldplay's Will Champion chose Juno for one of his twins (whose brother is the kingly Rex).
 
Juno was the sister and wife (hmmm) of Jupiter, and the mother of Mars and Vulcan. The patron goddess of Rome and protector of women and marriage, Juno's name is heard in Virgil's Aeneid, Shakespeare's The Tempest, and Sean O'Casey's 1924 play Juno and the Paycock. The deity's name is of uncertain origin, but likely derives from the root -iuwen, meaning young. With Jupiter and Minerva, she made the Capitoline triad, whose worship was at the very center of Roman religion.

Juno

The Hungarian classic Laszlo, with its zippy 'z' middle and energetic 'o' ending, has become something of a hipster option, beginning to be considered by cutting-edge parents.
 
A name with a royal heritage in its native country in the Ladislaus form, it is still among the top Hungarian names for boys. In Hungary, Laszlo is pronounced with a soft S sound.
 
Laszlo is probably most familiar to Americans via the noble Paul Henreid character in Casablanca, who was Czech. There have been other fictional Laszlos in Real Genius and the Doctor Who series, and Laszlo is the name of the Ralph Fiennes character in The English Patient.
 
Real life namesakes include painter Moholy-Nagy and acclaimed cinematographer Kovacs. Two well-known actors who were born with the name Laszlo are Peter Lorre and Leslie Howard.
 
The spelling of the name is sometimes streamlined to Lazlo.

Laszlo

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.

Mime Marcel Marceau actually had two versions of the same name. Marcel, Marceau, Marcella, Marcus, Mark -- all are variation of the Roman mythological name Mars, the god of war.

Marceau

Margot is suddenly a star again. After a nearly-half century absence, it hopped back on the Top 1000 list in 2013 and is on the rise. The Margot spelling is now given to three times as many baby girls as the Margo one.
 Makes sense, as Margot is a name that has a lot going for it: spelled with or without the final 't', it's one of the few <a href="https://nameberry.com/girls-names">girls’ names</a> with the dynamic o-ending sound; it's familiar, yet uncommon enough to be distinctive.
 
Margot originated as a French pet form of Marguerite, a name that ultimately derived from the Greek margarites, meaning "pearl." Other spellings include Margo and Margaux. Margaux Hemingway was originally Margot but changed the spelling to honor the wine from the French village of Margaux that was drunk by her parents on the night she was conceived.
 Movie buffs will remember Bette Davis's archetypal role as Margo Channing in All About Eve (the actress named her own daughter Margot), while balletomanes will associate the name with the great English dancer Margot Fonteyn (born Margaret).
 In the film Margot at the Wedding, Margot was played by Nicole Kidman; in The Royal Tenenbaums, Gwyneth Paltrow was Margot T. Gorgeous Australian actress Margot Robbie has made an impact here in the film The Wolf of Wall Street.

Margot

Familiar via such notable Marios as Lanza, Cuomo, Andretti, Puzo, and Van Peebles, this Italian name has been fully integrated into the US.

Mario is one of the many surprising names for boys that has always ranked among the US Top 1000, in the top half of the list for more than a hundred years. While it's now off its peak, the fashionable o ending gives it some new style power.

Mario might even be considered a mythological name, thanks to its origins in Mars, the name of the Roman god of war and of the so-called red planet. Mars rules the sign of Aries, so Mario might make a good name for an Aries baby or any boy born under a fire sign.

Mario

Is it Marlo, Marlow, or Marlowe? Suddenly they all seem very much in the air, in tune with rhyming cousins Harlow and Arlo. It all started when Margaret Julia Thomas began being known as Marlo (after being previously nicknamed Margie and Marlow). More recently, Jason Schwartzman used the e-ending version for his young daughter, Marlowe Rivers, as did Sienna Miller for her baby girl Marlowe Ottoline.
 While we love the o-sound at the end and think that Marlo or Marlow or Marlowe, however it's spelling, has an attractively lush sound, we do find the trio a bit confusing.
 Marlowe is, of course, a popular surname, going back to sixteen century poet and playwright Christopher and also exemplified by iconic Raymond Chandler private eye Philip.

Marlowe

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

Monroe is a presidential name which, thanks to the immortal beauty of Marilyn Monroe, is catching on fast for baby girls. Mariah Carey and Nick Cannon chose it for their twin daughter, honoring Marilyn Monroe. Their use of Monroe as a <a href="https://nameberry.com/girls-names">girls’ name</a> did much to revive this Old Man name, a la Sydney, as a newly fashionable choice for girls.

Monroe

Moreau

This nouveau name of Keanu Reeves's character in The Matrix has not enjoyed the same burst of popularity as its female counterpart, Trinity, but it definitely sounds, well, newer. Neo Rauch is an interesting contemporary German artist.

 In the Southern African language of Tswana, it is a unisex name meaning "gift".

The association with the infamous Nero, the fiddling Roman emperor, would be unavoidable. But there was also the detective Nero Wolfe, hero of many mystery stories.
 Nero was born Lucius Domitius Ahenobarbus, and Lucius might be a preferable choice if you know anything about ancient Roman history.

Nero

Nico is one of the great nickname names, full of charm, energy and effortless cool -- a neo Nick.
 Nico is commonly heard in Italy -- as a short form of Niccolo -- and also in France, Belgium, Germany, Holland and Spanish-speaking countries.
 As a unisex nickname name, Nico is associated with the German-born single-named Velvet Underground singer (nee Christa) promoted by Andy Warhol. And Nico Reilly was one of the female leads on the TV series Lipstick Jungle. But over 90% of the American babies named Nico are boys.

Nico

Oslo, the capital city of Norway, makes for an intriguing new place name, especially with its bookended O's, as in Otto. One Berry has already used it and we predict others will follow.

Oslo

Could Philo be the next Milo?
 We love the o-ending and sweet meaning of this dynamic and distinctive Greek name, often used in literature, but never particularly popular.
 The ancient Philo (aka Philo of Alexandria and Philo the Jew) was a Biblical philosopher who attempted to merge Greek and Jewish thought. 
 A character named Philo was a minor figure in Shakespeare's Antony and Cleopatra, it was the name of the S. S. Van Dine aristocratic dandy detective Philo Vance, and Clint Eastwood's character in both Any Which Way You Can and Any Which Way But Loose was Philo Beddoe. Most well known Philo in recent real life was inventor Philo Farnsworth.

Philo

Cool meets Born Again meets Brad and Angelina, who made Shiloh an instant star when they chose it for their daughter. While Shiloh has risen from obscurity thanks to its celebrity baby use, it hasn't become a star the way brother names Maddox and Pax have. It entered the Top 1000 in 2007, one year after the birth of Ms. Jolie-Pitt.
 The town of Shiloh is mentioned several times in the Old Testament--it was where Joshua and the Israelites assembled to cast lots for the seven tribes and for many years it was where the Ark of the Covenant resided, becoming a place of pilgrimage. Shiloh is also the site in Tennessee of a major, bloody, Civil War battle.
 Trivia tidbit: Shiloh is the name Angelina Jolie's parents had picked for their first child before her mother miscarried.

Shiloh

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.

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 dashing French surname name most famously borne by Henry David Thoreau, an American naturalist, writer and philosopher who influenced such notable figures as Leo Tolstoy, Mahatma Gandhi, and Martin Luther King Jr. The most common modern American pronunciation is "thor-OH", with emphasis on the final syllable, although Thoreau himself pronounced it "THOR-oh".

 The origins of the surname are not entirely clear, although one possibility is that it derives from a diminutive form of the Old French tor, meaning "bull" (the root of the modern French word taureau). A fitting choice for a Taurus baby boy!

 Thoreau may also be related to the Norse name Thor "thunder", or to the Germanic name Theodoric and its French form Thierry "ruler of the people".

 With its on-trend sound and literary pedigree, Thoreau certainly makes for a rare but appealing choice. Zac and Kate Hanson used it as a middle name for their fifth child, born in 2021.

Thoreau

Vigo is both an Italian and Spanish surname and a Scandinavian first name. As a place name, it's found in Spain, Italy, England – and Indiana.
 Vigo the Carpathian is the fictional villain of Ghostbusters II. The most famous surnamed Vigo is Jean Vigo, the great early French film director, namesake of the Prix Jean Vigo award. As a name, it couldn't be more vigorous.

Vigo

An ancient tree that figures in literature from Shakespeare to Harry Potter and is believed to possess magical powers, Willow is a lovely name, as graceful as its inspiration.
 Willow's use as a given name derives directly from the willow tree, whose name was derived from the Old English word welig, meaning "willow." Willow trees are associated with grace and elegance, which gave way to the adjective "willowy." Other names with meanings related to willows include Arava, Willoughby, Dozier, Wellesley, Selby, and Salton.
 
This elegant and charming nature name has been chosen for their daughters by Will Smith and Jada Pinkett Smith, Michelle Monaghan and Pink. It's been a fast riser in recent years, climbing along with other Will names Willa, William and Will, having taken off here a year after the character of Willow was introduced on Buffy the Vampire Slayer in 1997.
 
Willow is also popular in other English-speaking countries: Australia and the UK, Canada, Ireland, and Scotland.
 
The name has transcended its one-time hippie aura to move into the realm of reappraised and appreciated <a href="https://nameberry.com/list/329/nature-baby-names">nature names</a>. The willow is believed by the Romani to possess the ability to heal the sick and rejuvenate the aged.
 
Pink was quoted as saying her choice was influenced by a willow tree she grew up near, and that it is the most flexible tree that nothing can break—no wind, no elements, it can bend and withstand anything.

Willow

avo's list ""O" ending names" of 45 great name ideas: Adriano - Willow!