Names Ending in O for Boys

Riko could make a fun alternative to Nico/Niko and provide a fresh feeling twist on Richard or Ricky.

Riko

Rikuto

Rintaro

Given to a small handful of boys each year since 2016, Italian surname Rizzo could make an unexpected and sparky choice for a boy. Similar in sound to Reese, Rio, and Rico, parents may have been inspired by baseball player, Anthony Rizzo.
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Derived from the word <em>riccio</em>, Rizzo means "curly-haired", it was given to 8 boys (and 5 girls) in 2024.

Rizzo

Robeto

Robinho

Rodolpho

Rodrico

Rokko

Rolondo

Romaldo

Romando

A spelling variation of Romão, used in Brazil or in places which do not use or allow accented characters. It is the Portuguese form of the popular name Roman.

Romao

The Portuguese form of the popular name Roman, Romão was popular in Brazil in the first half of the 20th century. In Brazil, it is pronounced ho-MOW, while elsewhere, it is said roo-MOW, but in both cases, it has a nasal ending sound. Brazilian footballer Luiz Fernando Borges Romão is known mononymously as Romão.

Romão

Romondo

Romualdo

Ronaldinho

An elaborate diminutive of Ronaldo, with the potential for nickname Dino, Ronnie, and Rio. 

Ronaldino

Rondo

Ronreaco

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.

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.

Baby boy Names ending in the letter O, with meanings, origins, and popularity, including top boy names that end in O such as Milo and Kylo along with unique O-ending names such as Quinto. (Page 133)

1770+ Boy Names Ending in O