Unique Baby Names That End in O
Updated Mon Nov 13 2023
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Unique baby names that end in O (and the "o" sound) are among the very hottest right now, with the likes of Leo and Theo, Harlow and Margot rocketing up the popularity charts.
But there are still oodles of obscure O-ending names out there, just waiting to be discovered. We've polled our members to bring you 100+ of Nameberry's very favorite unique O-ending baby names, from Amparo and Benno to Yarrow and Zeno.
If you want to see even more baby names ending in O, check out our complete lists of Girl Names Ending in O and Boy Names Ending in O.
If quirky baby names ending in O are your thing, find our full list of rare, uncommon, and unique names ending in o here, ordered by their current popularity on Nameberry.
RELATED:
- Elio
Origin:
Italian, SpanishMeaning:
"sun"Description:
Elio is a sunny and spirited Italian and Spanish name that makes a great crossover prospect, which could catch on as Enzo has. Elio is also currently popular in France, ranking in the Top 250.
- Otto
Origin:
GermanMeaning:
"wealthy"Description:
Otto is cool again. Long a quintessential Old Man Name, Otto has been promoted to trending darling of adventurous baby namers.
- Cleo
Origin:
GreekMeaning:
"glory"Description:
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.
- Shiloh
Origin:
Biblical place-name, HebrewMeaning:
"tranquil"Description:
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.
- Juno
Origin:
LatinMeaning:
"queen of the heavens; young"Description:
Juno is an ancient name that feels as fresh as if it had been minted, well, not yesterday, but in 2007. Since the release of the popular indie film Juno, this lively but strong Roman goddess name has held new potential as a baby name. Currently in the UK Top 500 and used in The Netherlands too, Juno is on the rise in the US - and is 15 times more popular than it was before the release of the film.
- Marlowe
Origin:
Variation of Marlow, EnglishMeaning:
"driftwood"Description:
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.
- Apollo
Origin:
Greek mythology nameMeaning:
"destroyer; strength; father's light"Description:
With mythological names rising, the handsome son of Zeus and god of medicine, music, and poetry among many other things might offer an interesting, and melodic option. Similar in style to Atlas and Atticus and similar in sound to Arlo, Paolo, Paul, and Ollie, Apollo entered the US Top 1000 back in 2012, and was propelled upwards after it was chosen by Gwen Stefani and Gavin Rossdale in 2014.
- Harlow
Origin:
English surnameMeaning:
"rock hill or army hill"Description:
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.
- Ivo
Origin:
GermanMeaning:
"yew wood, archer"Description:
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.
- Rocco
Origin:
Italian from GermanMeaning:
"rest"Description:
Madonna did much to polish up the image of this old-neighborhood Italian choice when she picked it for her son with British director Guy Ritchie, and several years later it was also used by Rose Byrne and Bobby Canavale for their son. It now feels much more mainstream than many celebrity baby names, sharing the quirky appeal of some other so-far-out-they're-in baby names as Bruno and Hugo.
- Roscoe
Origin:
NorseMeaning:
"deer forest"Description:
Fairly popular a hundred years ago but out of sight now, the quirky Roscoe deserves a place on every adventurous baby-namer's long list. It joins Rufus, Roman, Remy, Romulus, and Ray as one of the R names that sound fresh again after too many years of Robert, Richard, and Ronald.
- Yarrow
Origin:
Botanical name, EnglishMeaning:
"rough stream"Description:
Highly unusual as a baby name for either gender, Yarrow is an herb that grows wild and has long been used for its medicinal property. It's named for the mythical Achilles, who was said to carry yarrow into battle.
- Meadow
Origin:
Nature nameDescription:
Meadow's upward popularity trajectory certainly suggests that the name has transcended its connection to The Sopranos.. In the US, more than 750 baby girls were named Meadow last year, a number we expect to keep rising.
- Cato
Origin:
LatinMeaning:
"all-knowing"Description:
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.
- Cosmo
Origin:
Italian, English, GreekMeaning:
"order, beauty, universe"Description:
With a touch of celestial power, a hint of clunky charm, and the totally cool -o ending, Cosmo may well be finally shaking itself free of both the Seinfeld association (which made it a punchline of a joke) and the cartoon fairy association from The Fairly OddParents. In fact, it is in the Top 1000 in the UK and a favorite on Nameberry.
- Bruno
Origin:
GermanicMeaning:
"brown"Description:
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.
- Aurelio
Origin:
Italian; Spanish, variation of AureliusMeaning:
"the golden one"Description:
Aurelio is an energetic Italian name rarely heard in the US, 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.
- Ezio
Origin:
Italian from GreekMeaning:
"eagle"Description:
An operatic Italian option via South Pacific star Pinza, one of several Italian names currently hot in France. Ezio is the Italian form of the Greek name Aetius.
- Coco
Origin:
Spanish and French pet nameDescription:
Coco came to prominence as the nickname of the legendary French designer Chanel (born Gabrielle) and has lately become a starbaby favorite, initially chosen by Courteney Cox for her daughter Coco Riley in 2004. At first it was the kind of name that the press loves to ridicule, but we predict Coco's heading for more broad acceptance and even popularity.
- Inigo
Origin:
Basque, medieval Spanish variation of IgnatiusMeaning:
"fiery"Description:
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 Spanish names for boys were fashionable in England, especially among devout Roman Catholics.