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