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