Boy names starting with O – origin, meaning & statistics 2023

Here you'll find the 74 best baby boy names that start with the letter O – modern, unique or classic, and from all over the world. Click on a name to see its origin, meaning, pronunciation, variants and statistical popularity.

Apart from masculine given names with O we also have girl names that start with O and unisex names that start with O. Check out all names beginning with O. Do have a look at all our male names, female names and gender-neutral names from A to Z. Or simply view all our names in the list first names.

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Boy names with O

Oakley means "oak clearing" ...
Oberon means "powerful elf" or "ruler of the elves" ...
Obi means "heart" in Igbo ...
Ocean means "ocean" ...
Octavian means "eighth", "born in the eighth month" or "born eighth" ...
Ocke means "ancestor" and "rich", "prosperous" or "wealthy" ...
Octavius means "eighth", "born in the eighth month" or "born eighth" ...
Odin means "furious", "eager" and "mad", but as well "song", "poetry" or "inspiration" ...
Odinn means "furious", "eager" and "mad", but as well "song", "poetry" or "inspiration" ...
Odo means "property", "inheritance" and "richness" ...
Odysseus means "wrathful" and "hateful" ...
Odis means "rich", "prosperous" or "wealthy" ...
Oisín "little deer" ...
Oisin means "little deer" ...
Oke means "ancestor"s descendant" and "God"s spear" or "deer friend" ...
Oki means "ocean centered" in Japanese ...
Okke means "rich", "prosperous" or "wealthy" ...
Oihan: The name Oihan means "forest" in Basque ...
Oktavian means "eighth", "born in the eighth month" or "born eighth" ...
Ole means "ancestor"s descendant" and "rich powerful heritage" ...
Okko means "rich inheriting person" ...
Olaf means "ancestor"s descendant" ...
Ola: The masculine and feminine name Ola means "ancestor"s descendant" ...
Olav means "ancestor"s descendant" ...
Oleg means "blessed" or "holy" and "healthy" ...
Olek means "defending men", "defender of men", "defender of the people" or "protector of men" ...
Olf means "wolf" ...
Oli means "olive", "olive tree planter" and "peaceful" for girls and "ancestor"s descendant", "warlike elf" or "olive tree" for boys ...
Olin means "ancestor"s descendant" ...
Oliver means "olive tree", "olive" or "olive tree planter", "ancestor"s descendant" or "warlike elf" ...
Olivier means "olive tree" or "olive tree planter", "ancestor"s descendant" or "warlike elf" ...
Oliverio means "olive tree", "olive" or "olive tree planter", "ancestor"s descendant" or "warlike elf" ...
Oliviero means "olive tree", "olive" or "olive tree planter", "ancestor"s descendant" or "warlike elf" ...
Olivér means "olive tree", "olive" or "olive tree planter", "ancestor"s descendant" or "warlike elf" ...
Olle means "ancestor"s descendant" ...
Olli means "olive", "olive tree planter" and "peaceful" for girls and "ancestor"s descendant", "warlike elf" or "olive tree" for boys ...
Ollie means "olive", "olive tree planter" and "peaceful" for girls and "ancestor"s descendant", "warlike elf" or "olive tree" for boys ...
Olufemi means "God loves me" ...
Olliver means "olive tree" or "olive tree planter", "ancestor"s descendant" or "warlike elf" ...
Olly means "olive", "olive tree planter" and "peaceful" for girls and "ancestor"s descendant", "warlike elf" or "olive tree" for boys ...
Ommo means "wealth", "fortune" and "famous" ...
Omar means "speaker" and "long living" or "flourishing" ...
Omid means "hope" ...
Ondrej means "manly", "masculine" and "brave" ...
Onno: Onne means "to induldge" ...
Onyx means "onyx" and "gem stone" ...
Onni means "lucky", "luck" or "happiness" ...
Orell means "golden", "gilded" or "the golden one" ...
Oren means "pine tree" ...
Orest means "of the mountains" or "stands on a mountain" ...
Oriole means "golden" ...
Orion: The meaning of the name Orion is unsure ...
Orlando means "famous and brave" or "famous throughout the land" and "from the famous land" ...
Osbourne means "divine bear" ...
Orson means "bear", "little bear" or "bear cub" ...
Oscar means "God"s spear" ...
Osgar means "God"s spear" ...
Oskar means "God"s spear" ...
Osborn means "divine bear" ...
Osman means "baby bustard", but as well "wise", "intuitive" or "most powerful" ...
Osvaldo means "God rules" or "God"s power" ...
Oswald means "God rules" or "God"s power" ...
Otis means "rich", "prosperous" or "wealthy" ...
Osborne means "divine bear" ...
Ottar: The name Ottar derived from Old Norse "ótti" meaning "fear", "terror", "dread" and "arr" meaning "warrior", "army" or "geirr" meaning "spear" ...
Ottfried derived from the Old High German words "ot" meaning "property", "wealth" or "fortune" and "fridu" meaning "peace" or "protection" ...
Otto means "rich", "prosperous" or "wealthy" ...
Ove means "heritage" or "inheritance", "edge of a sword" or "terror" and also "active" or "at work" ...
Owain means "youth" and "young warrior" and "well born" ...
Owe means "heritage" or "inheritance", "edge of a sword" or "terror" and also "active" or "at work" ...
Owen means "well born", "youth" and "young warrior", "born from the yew tree" and "lamb" ...
Ozzie means "God"s spear" and "deer friend", "God rules" or "God"s power", "baby bustard" and "divine bear" ...
Owenn means "well born", "youth" and "young warrior", "born from the yew tree" and "lamb" ...
Ozzy means "God"s spear" and "deer friend", "God rules" or "God"s power", "baby bustard" and "divine bear" ...