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

Olivia

Latin

"olive tree"

Olivian

Romanian variation of Oliver

Olivier

French

"olive tree"

Oliviero

Olivieros

Oliwier

Polish, from Latin

"olive tree or elf army"

Oliwjer

Olle

Swedish diminutive of Olaf, Norse

"ancestor's relic"

Ollice

Variation of Ollis

Ollie

Diminutive of Oliver, Latin

"olive tree"

Ollier

Ollin

Ollivander

Literary name, compound of Oliver and Alexander, Latin and Greek

"olive tree and defending men"

Olliver

Ollivier

Olly

Ollyver

Olo

Olof

Olov