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