Here you'll find the 76 best masculine first 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.
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Boy names with O
- Obi
- Oberon
- Oakley
- Ocean
- Ocke
- Octavius
- Octavian
- Odin
- Odinn
- Odysseus
- Oihan
- Odis
- Odo
- Oisin
- Oisín
- Okke
- Oke
- Oki
- Okko
- Oktavian
- Ola
- Olaf
- Olav
- Oleg
- Ole
- Olek
- Olf
- Olin
- Oli
- Oliverio
- Oliver
- Olivier
- Olivér
- Oliviero
- Olle
- Ollie
- Olli
- Olly
- Olliver
- Ollin
- Olufemi
- Olusola – God makes wealth
- Omar
- Ommo
- Omid
- Ondrej
- Onni
- Onyx
- Onno
- Orell
- Orest
- Oriole
- Orion
- Orlando
- Oren – Pine Tree
- Osborn
- Osborne
- Osbourne
- Orson
- Osgar
- Osman
- Oskar – God's spear
- Oswald
- Osvaldo
- Oscar – God's spear
- Ottar
- Otis
- Ottfried
- Otto
- Ove
- Owain
- Owen
- Owenn
- Owe
- Ozzy
- Ozzie
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