Unique Baby Names That End in O

By Emma Waterhouse · Updated September 2026

Names153

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Total Names153

Across 8 pages

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About this list

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 ranks.

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.

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The names

Showing 1–20 of 153

Otto
German
"wealthy"
Otto is cool again. Long a quintessential Old Man Name, Otto has been promoted to trending darling of adventurous baby namers. Like most German names , Otto fell out of favor during and after the two…
Shiloh
Biblical place-name, Hebrew
"tranquil"
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…
Meadow
Nature name
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…
Angelo
Italian
"angel, messenger"
Old-school Italian name that could find new fans thanks to singer Adele, who chose it for her son after months of baby name mystery. Angelo is in the same name category as Rocco, the name of…
Harlow
English surname
"rock hill or army hill"
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…
Cairo
Egyptian place-name, Arabic
"the conqueror, the victorious"
Cairo is an exciting place name possibility with upbeat o ending and an on-trend first syllable. Debuting in the US Top 1000 in 2015, it has been climbing ever since, and, as of 2023, it is given to…
Elio
Italian, Spanish
"sun"
Elio is a sunny and spirited Italian and Spanish name that makes a great crossover prospect, which could catch on as Enzo has. Derived from the Roman Aelius and the Greek Helios, it has an appealing…
Valentino
Latin
"strength, health"
A dashing, dramatic and romantic Italian surname, associated with early movie heartthrob Rudolph, and later with Italian fashion designer Valentino (Garavani). Also the name of an early Roman saint,…
Apollo
Greek mythology name
"destroyer; strength; father's light"
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…
Rocco
Italian from German
"rest; rook, crow; roar"
Cool and edgy meets sunny and beachy with this charming Italian option that might be more timeless than you think. Borne by St. Rocco, the 14th-century patron of the sick, known for helping those…
Marlowe
Variation of Marlow, English
"driftwood"
Marlowe is very much in the air, with its lovely -o ending and the modern twist it offers on the likes of Margaret, Margot, Martha, and Marlene. But is it Marlowe, Marlow, or Marlo? Well, for a girl…
Eliseo
Italian and Spanish variation of Elisha
"God is my salvation"
This Latinate name would have no problem fitting into an American classroom. It has made frequent appearances in the US Top 1000 over the last several decades. Borne by several Spanish saints, it…
Cleo
Greek
"glory"
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…
Maximo
Spanish variation of Maximus, Latin
"greatest"
With the ubiquitous Max heard at every playground across the US, international versions have been gaining traction in an attempt to provide a fresh avenue to the highly sought nickname. This Spanish…
Aurelio
Italian; Spanish, variation of Aurelius
"the golden one"
Aurelio is an energetic Italian and Spanish name, with an attractive golden aura. Derived from the Latin aureus , it's a relative of rising star Aurelia and the Roman Aurelius. A Top 200 name in…
Bruno
Germanic
"brown"
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.…
Franco
Italian variation of Francis
"Frenchman or free man"
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…
Dario
Italian variation of Darius
"possessing goodness"
More creative and artsy than Mario. Dario is starting to edge up the US popularity list after languishing near the bottom of the Top 1000 over the last four decades. Is that inspired by Dario's…
Orlando
Italian variation of Roland
"famous throughout the land"
Orlando, the ornate Italianate twist on the dated Roland, with a literary heritage stretching back to Shakespeare and before, has appealing book-ended o's, and is open to combination with almost any…
Jericho
Biblical place-name
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…

Unique Baby Names That End in O

About this list

The names

Otto

Shiloh

Meadow

Angelo

Harlow

Cairo

Elio

Valentino

Apollo

Rocco

Marlowe

Eliseo

Cleo

Maximo

Aurelio

Bruno

Franco

Dario

Orlando

Jericho