1770+ Boy Names Ending in O
Across 218 pages
of 218
About this list
Boy names ending in O offer many intriguing options, from such top names as Theo to unique O-ending names from Kylo to Zino.
Mateo is the most popular boy name ending with O right now, though there are nearly 100 O-ending boy names among the US Top 1000. Along with Mateo, other boy names in the US Top 1000 include Leo, Santiago, Diego, Romeo, and Antonio.
And there are hundreds more unique names for boys that end with the letter O worthy of your consideration. These range from the biblical Jethro to the ancient Greek Cosmo to the cool, modern Rio and Po.
Here are all Nameberry’s boy names that end with the letter O, ordered by their current popularity on Nameberry.
RELATED:
The names
Mateo
Spanish
"gift of God"
Mateo is a Latinate name that like Mia and Luca, is becoming popular far beyond its native Spanish community. With its fresh feel and charm, it made a surprise entrance to the boys' Top 10 in 2023.…
Leo
Latin
"lion"
Leo is a strong-yet-friendly name that was common among the Romans, used for fourteen popes, and is now at its highest point ever in the US. Brave but sparky, Leo has ranked in the Top 20 in the US,…
Santiago
Place-name or Latin
"Saint James"
Santiago is a spirited Spanish name with great crossover potential. It's a place-name (a city in Chile), a surname, and the name of the patron saint of Spain. Santiago has been rising through the…
Thiago
Spelling variation of Tiago, diminutive of Santiago
"supplanter"
Some high-profile soccer stars, such as Thiago Silva, have contributed to its success. The correct Portuguese pronunciation is chee-AH-go. Thiago is ranked Number 2 for boys in Puerto Rico.
Enzo
Italian variation of Heinz or Henry, German, or diminutive form of -enzo names, "estate ruler"
"estate ruler"
Internationally popular, Enzo is a confident and captivating name, playful but down to earth. Similar in sound or style to the likes of Leo, Luca, Eli, and Ezra, and in tune with Mateo, Gabriel, and…
Theo
Diminutive of Theodore
"gift of God"
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…
Leonardo
Italian and Spanish variation of Leonard, German
"brave lion"
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…
Emiliano
Italian and Spanish variation of Emil
"rival"
Emiliano is an appealing Latinate version of Emil, with the same gentle sounds but additional flair. Popular in Chile and Mexico, where it ranks in the Top 20, Emiliano is also a rising name in the…
Lorenzo
Italian; Spanish, variation of Laurence
"from Laurentium"
Latinizing Lawrence gives it a whole new lease on life. Like Leonardo, Lorenzo has been integrated into the American stockpot of names, partly via actor Lorenzo Lamas. Other associations are with…
Milo
Latin and Old German
"soldier or merciful"
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…