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

Onslow

English

"Andrǣd's hill"

Onslowe

English

"Andrǣd's hill"

Ontario

Place-name

Onur

Oomer

Ooquna

Greenlandic

"sweet, cute"

Oos

Diminutive of Oswald, Eustace, or Osias, or a variant of Os and Oost, Dutch

"God; salvation; stable; east"

Ophelion

Greek

"help, aid; profit, benefit"

Ophir

Hebrew

Ophrah

Hebrew

"fawn"

Opie

Diminutive of Opal or Osborn

Optimus

Latin

"best"

Oqila

Greenlandic

"fast runner"

Or

Hebrew

"light"

Oracio

Aragonese variation of Horatio

"hour, time"

Oracle

English word name

"insight, wise council"

Orad

Oral

Variation of Aurelius or Oriol, or English word name

"golden; spoken"

Orange

Fruit and color name

Oratio