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

Adriano

Akello

Alberto is the Italian, Spanish and Portuguese variation of Albert and lends a more unusual and fashionable edge to this name which is still a grandpa name to many.

Alberto

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

For anyone seeking a more unusual version of Alexander, this is a real winner.
 Notable namesakes include the great Italian opera composer Scarlatti and the influential physicist Alessandro Volta, known primarily for the invention of the battery you use every day — as well as the contemporary hunky actor Alessandro Nivola. 
 Appealing short forms are Alessio and Sandro (as in Botticelli).

Alessandro

Alexandro

Alonso is the Spanish and Portuguese diminutive version of Alfonso, itself deriving from an old Germanic name "Adalfuns" meaning "noble and ready." Although the Italian spelling Alonzo is more popular in the US, Alonso has its own strong history. 


Alonso Quijano was the real name of Don Quixote — and the name of two characters in the Judy Garland musical Meet Me in St. Louis. It is also the surname of star Formula 1 driver Fernando Alonso.

Alonso

Alonzo is dashing and debonair, with a large measure of Latin flair.
 You may be surprised to know that Alonzo has been on the Most Popular list since 1880, when such records began to be kept, at which point it was Number 110. The same is true for nickname Lon, which was 193 at the time.
 Alonso Quijano was the real name of Don Quixote--Alonso being the Spanish version of the name. In the old Judy Garland musical Meet Me in St. Louis, Alonzo/Lon was the name of both her father and brother. 
 Horror film star Lon Chaney was christened Leonidas, but Lon Chaney, Jr. was Creighton at birth. Alonzo Mourning is a former basketball star who goes by the nickname Zo--much more modern sounding than Lon or Lonnie.

Alonzo

A well-used Spanish saint's name with a lot of flair that could definitely cross over to more general usage. It reached its peak in the United States in 1985, when it ranked Number 456. In Spain, Alvaro is a Top 20 boys' name.

Alvaro

Alvino

Antonio is a Shakespearean favorite -- the Bard used it in no less than five of his plays, and has long been a ubiquitous classic in Spanish-speaking countries, where the nickname Tonio is also prevalent. Antonio is also among an elite group of perennially popular names in the US, where it has always been among the boys' Top 1000 since baby name record-keeping started in 1880.

Antonio

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

Common Roman name mentioned in the Bible that has a crisply attractive sound. 

Aquilo

The name of the ship sailed by Jason in his search for the Golden Fleece is now more often used for starch, trucks, and heavy machinery. 

Argo

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

Subtract the last two letters of Arnold, and you're left with a much more modern-sounding name.  Arno is also the name of the main river in Florence, upon which sits the famed Ponte Vecchio. The Italian river name means "flowing water".

Arno

Words are not always easy to translate into <a href="https://nameberry.com/">baby names</a>, but the implications of being straight and swift lend this one great potential as a name. It also has the popular o-sound ending, which brings it further into the realm of possibility. Rising rock star Aja Volkman pulled a gender switch when she named her daughter Arrow Eve.

Arrow

Italian, Portuguese and Spanish variation of Arthur that makes the original feel more romantic and dashing.

Arturo

With the current craze for ancient Roman names, variations of the Latin Augustus with its majestic meaning are becoming more popular in many cultures. Month name August, also drawn from the original Augustus, is the most popular form in the US, but Augusto may start showing up on international popularity lists.

Augusto

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

Abeo

Akono 

Alecto

Amaretto

Balzo

Bardo has a poetic beginning and upbeat ending, with roots in several diverse cultures. It may be most familiar today via George Saunders' novel Lincoln in the Bardo, which refers to the Tibetan Buddhist state of suspension between one life and the next, resembling the Christian idea of Limbo. Bardo is also an ancient saint's name: Saint Bardo was the eleventh century bishop of Mainz, in Germany. Actress Sandra Bullock chose Bardo as her son's middle.

Bardo

Bayo

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

Smoldering Spanish actor Benicio Del Toro made this version an American possibility. It debuted on the US Top 1000 in 2016, when it was the third-fastest-rising boys' name.

Benicio

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

Bingo

One way to encourage some cheers for your little one, but not recommended. 

Bravo

It’s ok, we can talk about Bruno now!

Tough-yet-cuddly Bruno is an international name even in its origins: it derives from the Germanic word for “brown” plus a Latin ending, and was borrowed as a color word in many European languages.

Today, Bruno is popular in Latin America, Spain, and Eastern Europe, but has been — until recently, at least — neglected in North America.

In the middle ages, it was worn by several rulers and bishops, and an eleventh-century saint. In modern times, Bruno gets its “strong man” image from people like wrestler Bruno Sammartino, and Frank Bruno, the British boxer. That, and the fact it was traditionally a name for bears in children’s tales.

However, Bruno also has a more gentle, soulful side that more and more parents are seeing. Singer Bruno Mars (born Peter, but nicknamed Bruno from a young age after Sammartino) has done a lot to raise its popularity in the last 20 years.

The Disney movie Encanto may do even more, thanks to its misunderstood prophetic Uncle Bruno, and the catchy song We Don’t Talk About Bruno.

As <ahref="https://nameberry.com/baby-names/901/boy-names-ending-in-o">boy names ending in O</a> continue to rise, we can see this appealing to parents looking for something well-known, multicultural, and not too popular.

Its color meaning makes it especially good for a <ahref="https://nameberry.com/list/351/names-for-autumn-babies">boy born in autumn.</a>

Bruno

Calixto is known in Spain as the name of three popes, one of whom was the martyr, Callixtus I, regarded as a saint. Calixto has a lot of energy and futuristic spirit, thanks in part to the attention-grabbing 'x.' He is the main character in the Spanish classic, Fernando de Rojas's Tragicomedy of Calixto and Melibea.

Calixto

Energetic Italian classic that would blend with a surname of any ethnicity. 

Carlo

Carlow

Casparo

Cato conjures up images of ancient Roman statesmen and southern antebellum retainers; it could have revival potential, with its 'O' ending and the current interest in the names of Greek and Roman antiquity.
 The Roman statesman known as Cato the Elder was born Marcus Portius, the Cato added in tribute to his natural sagacity, practical wisdom and political expertise.
 Cato appears in Shakespeare's Julius Caesar and, to go from the sublime to the ridiculous, in the Pink Panther movies--and Kato was The Green Hornet's valet. Cato is also a 21st century Hunger Games name, which could do more to spur its popularity than all its past history.

Cato

Cedro

More unusual than Dakota or Austin, Colorado conjures images of majestic mountains and windswept wilderness. Some will prefer the more preppy Aspen, but Colorado feels like the true explorer.

Colorado

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

The fashion for using surnames as firsts has extended beyond the familiar Morgan and Parker to choices such as Cohen and O'Brien to -- why not? -- this quintessentially Irish name with the friendly o ending.

Costello

Variation of the popular religious name, boosted by megastar Portuguese footballer Cristiano Ronaldo.

Cristiano

Cadeau

Caspero

If you're a movie fan or a sports fan, you might be attracted to this name, via the film "Donnie Darko" or the Serbian-born basketball star Darko Milicic.  It is kind of dark, though.

Darko

Darro

Demetrio is an original way to a mythological name, and is further appealing as a boy's name inspired by a goddess, the earth mother Demeter.

Demetrio

Swashbuckling name worthy of a hero in a romance novel. Deveraux or Devereaux is drawn from the River Eure in France. Mick Jagger has a son named Deveraux.

Deveraux

Possibly meaning "bold", this West African surname is less commonly found as a first name, too.

Diallo

The energetic Diego is rising rapidly along with a lot of other authentically <a href="https://nameberry.com/baby-names/161/spanish-names">Spanish baby names</a> that work perfectly well with surnames of any origin. 
 Possibly a derivative of Santiago, Diego is a Sevillian saint, and one notable cultural namesake is Mexican painter Diego Rivera.

Diego

Italian heritage name. It's sweet and simple, but has fallen almost out of use since its heyday in the 1960s. 

Dino

Donaldo

For as long as we all shall live, Harry Potter's sneering nemesis. 

Draco

Dylano

A stalwart of Latin nomenclature that could work just as well for Anglos. Proof lies with the celebrity birth announcement — Hilaria and Alec Baldwin named their fifth child Eduardo Pau Lucas in 2020. This doesn't seem to have much impact on other parents, though: over 900 boys received the name in 2021, but the number is steadily decreasing.

Eduardo

Edvino

Elonzo

Dashing and popular Italian and Spanish favorite, as is Emiliano. With the popularity of girl names Emily and Emilia and of Italian names for boys, this one is sure to receive more attention.

Actor Emilio Estevez heightened the profile of this name.

Emilio

Fiery sound and uplifting meaning, but it's also among the Top 100 dog names. Spelled Fiyero, it's the hero of the book and musical "Wicked." 

Fiero

Fiorenzo

Fortuno

A classic Italian name still heard in the Italian-American community. Once tainted by the association with the Spanish dictator, it's now more likely to call up actor James Franco. 
 The bright o ending and the popularity of Pope Francis could increase the appeal of this name.

Franco

Frederico

Fiyero

This name of the patron saint of Naples would make an apt choice for a New Year's baby, or one with Neapolitan roots. 

Gennaro

Geno

At this point, there are more newborn American baby Gilbertos than Gilberts. 

Gilberto

Gordo

Well used in the Latino and Italian-American communities. 

Gustavo

Garrow

More familiar to English speakers in the Italian Elio form. 

Helio

Heraldo

Hespero is a more user-friendly version of Hesperos, in Greek mythology the personalification of the Evening Star.

Hespero

Hidalgo is the name of a minor planet, and, on Earth, the Spanish word for a nobleman, but we don't see much crossover potential. 

Hidalgo

Like Horace, Horatio is a variation on the Latin Horatius, but its Shakespearean and optimistic Horatio Alger pedigree makes it an attractive up-and-comer, especially with its cool final o. A modern reference is the charismatic TV character Horatio Caine played by David Caruso in CSI: Miami.
 Horatio was the given name of Lord Nelson, one of the most dashing of British heroes, the naval commander who led the British fleet to destroy the French at Trafalgar, and it also belonged to Hamlet's loyal friend. Another literary namesake is Captain Horatio Hornblower, the protagonist of a long-running series of naval novels penned by C. S. Forester, played on screen by Gregory Peck.

Horatio

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

Hondo

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

Ianto is a lively and unique spin on John, possible familiar to American sci-fi fans via the popular character on Torchwood.

Ianto

Indigo is one of the most appealing and evocative of the new generation of color names. Color names have joined flower and jewel names -- in a big way -- and Indigo, a deep blue-purple dye from plants native to India, is particularly striking for both girls and boys. Although most people don't think of it like this, Indigo might also be considered among the most stylish <a href="https://nameberry.com/baby-names/167/greek-names">Greek baby names</a> in use today.

Some cultural references: The Indigo Girls are a folk duo, 'Mood Indigo' is a classic Duke Ellington jazz composition, and there is a 1970's New Age theory that Indigo children possess special, sometimes supernatural abilities. Indigo is the name of a character in the Ntozake Shange novel Sassafrass, Cypress & Indigo, and was used for his daughter by Lou Diamond Phillips.

Indigo

This name of a California desert town, used by Deborah Falconer and Robert Downey, Jr. for their son, makes a much livelier and more individual – not to mention more masculine – improvisation on the themes of India and Indiana.

 The similar sounding color name Indigo is unisex – it was used by Lou Diamond Phillips for his daughter, as well as the group The Indigo Girls, but its o-ending makes it boy-friendly too.

Indio

A more distinctive alternative to Alejandro. 

Isandro

Itoro

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.

Javiero

A biblical place name with trumpeting verve and strength.
 Though rarely heard as a first name, Jericho has appeared in the titles of films, TV series, songs, bands, comics, and video games (Clive Barker's Jericho). It's perhaps these references that helped it enter the Top 1000 for the first time in 2013 -- as one of the year's fastest-rising names.

Jericho

Jethro, though the biblical father-in-law of Moses, has suffered for a long time from a Beverly Hillbilly image, but some really adventurous parents might consider updating and urbanizing it and transitioning it into the hip o-ending category. 
 The 60s rock group Jethro Tull was named for an eighteenth century British agricultural reformer and inventor.

Jethro

Joe is still the ultimate good-guy name, not at all diminished by its longevity or popularity or its everyman rep as Regular Joe, Cowboy Joe, G.I. Joe, Joe Exotic, Joe Blow, Joe Millionaire, Average Joe — and now President Joe (Biden). 
 There are millions of Josephs who have gone primarily by the nickname Joe; just a few of the more prominent Joes are Biden, Namath, Torre, Di Maggio, Lieberman, Montana, and Jonas.
 Several celebrities have chosen Joe as a full name for their sons, including Kate Winslet, Kevin Costner, Sting, and Stephen King.
 While Joe and long-form Joseph have always been among the most common male names in the US, there was never a President Joe until Biden.

Jordano

A Japanese name with a great meaning, a cool Kai sound, and lots of potential to become an international export.

Kaito

A pet form of Karl, the form of Carl used throughout Scandinavia.

Karo

Kato gained a lot of attention during the  O. J. Simpson trial via witness Kato Kaelin (born Brian). It is also the name of a fictional character in "The Green Hornet." Spelled Cato, it has a lot more credibility as an ancient name.

Kato

Kenzo is a common Japanese name with several creative bearers: the single-named fashion designer, prizewinning architect Kenzo Takada, and painter Kenzo Okada, which makes it internationally recognizable.

 Kenzo was chosen for their son by Kimora Lee Simmons and Djimon Hounsou, inspired by the designer.

 Kenzo can have other meanings, all positive, depending on the Japanese characters used.

Kenzo

Kondo

Lively nickname, but we'd prefer the more substantial Orlando. 

Lando

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

This sleek Italian name was raised from the dead by Mexican Mozart in the Jungle star Gael Garcia Bernal, who chose it for his son (he also has a daughter named Libertad). For athletic inspiration, Lazaro Alvarez, boxing for Cuba, is the three-time world champion lightweight boxer. Lazarus and root name Eleazar are both also destined for comebacks.

Lazaro

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.

For centuries this name was associated primarily with the towering figure of Italian Renaissance painter-scientist-inventor Leonardo da Vinci, and was scarcely used outside the Latin culture. 

But then along came Leonardo DiCaprio, who was supposedly given the name because his pregnant mother felt her first kick while looking at a da Vinci painting in the Ufizzi Gallery in Florence, and who would make the name young and handsome and multi-cultural. 
 Leonardo is a popular choice among other attractive Italian and <a href="https://nameberry.com/baby-names/806/spanish-names-for-boys">Spanish names for boys</a>, and its cousin Leo is popular as well.

Leonardo

ThatsAmore's list "Begins or Ends with O" of 194 great name ideas: Adriano - Zo!

Begins or Ends with O

A compilation of names that begin (and) or end with the LETTER or SOUND of "O".
