Boy names ending in O offer many intriguing options.
 
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. The top names below rank among the current US Top 1000 Baby Names and are ordered by popularity. Unique names rank below the Top 1000 and are listed alphabetically.

Names Ending in O for Boys

Common Japanese name most notably connected to Shigeo Shingō, Japanese industrial engineer and expert on the Toyota Production System.

Shingo

Shinjiro

This Japanese name is more often seen on girls in Japan, yet you may be familiar with it as a male name thanks to the anime series Naruto.

Shino

Shiro

If you encounter this name in the real world, it may be written using kanji that mean "bright person," "happy person," "blessed person," or other related meanings. However, in the anime series My Hero Academia, character Shoto Todoroki's name is written in kanji that mean "burn" and "freeze," referencing his powers.

Shoto

Shoyo

A jauntier, more accessible form of Siegfried.

Sippo

A cool and breezy nature name with a stylish sound, used in the Scirocco spelling by Volkswagen for one of its cars.

Sirocco

Spero has a cool sound and a wonderful positive meaning.

Spero

If Taylor is too mainstream, this Hungarian surname has a cool sound and shares the occupational meaning.

Szabo

Borne by the esteemed Japanese architect Tadao Ando.

Tadao

Tahvo

Taisto

Takahiro

Takato

Also spelled Tahlako, this Choctaw name is an animal related name. 

Talako

A high-energy (literally!) Finnish and Estonian name that could easily cross borders.

Tarmo

Tarvo has two potential origin stories. The first is that it derives from the Old Finnish word tarvas, meaning "wild aurochs," a wild species of cattle that is now extinct. The second possible derivation is from the Estonian tarv, meaning "energy."

Tarvo

An ancient Germanic name belonging to an 8th century duke of Bavaria, as well as to a modern-day prince of Bulgaria. It is a diminutive form from Tasso, which probably derives from the Germanic name Taginbert, a cognate of Dagobert.

Tassilo

Teboho comes from the Sotho language native to southern Africa. It's most commonly used as a name in Lesotho and South Africa.

Teboho

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 78)

1770+ Boy Names Ending in O