551 Boy Names That Start With O (with Meanings and Popularity)

Osric

English

"divine ruler"

Osrick

Ossian

Old Irish

"little deer"

Ossie

Short form of Oscar, Osias, Oswald et al

Ossin

Irish, variation of Ossian

"little dear"

Ostadar

Basque

"rainbow"

Ostap

Ukrainian from Greek

"well-built, stable"

Ostromir

Slavic

"sharp peace"

Ostyn

Variation of Austin, English, shortened form of Augustine

"great, magnificent"

O'sullivan

Irish

"son of the black-eyed one"

Osvald

Osvaldo

Spanish variation of Oswald

Oswaldo

Oswall

Oswell

Oswin

Old English

"God's friend"

Oswold

Oswyn

Old English

"God's friend"

Oszkar

Ot

Catalan form of Otto

"wealthy"