Mar 152012
- Name - Obadiah
- Name - Octavian
- Name - Ocysellus
- Name - Odhren
- Name - Odile
- Name - Odilo
- Name - Odon
- Name - Oengus
- Name - Offero
- Name - Ogmund
- Name - Oidilwald
- Name - Olaf
- Name - Olaguerand
- Name - Olalla
- Name - Oldegar
- Name - Olegari
- Name - Olek
- Name - Oleksander
- Name - Oleksandr
- Name - Ollegarius
- Name - Olon
- Name - Olympiades
- Name - Omeljan
- Name - Omobono
- Name - Ona
- Name - Oncho
- Name - Onchu
- Name - Onchuo
- Name - Ondrej
- Name - Onofre
- Name - Onofrio
- Name - Onophrius
- Name - Onophry
- Name - Onouphrius
- Name - Onuphrius
- Name - Optatus
- Name - Orencio
- Name - Orentius
- Name - Oria
- Name - Orientius
- Name - Orso
- Name - Osanna
- Name - Osburga
- Name - Osburgh
- Name - Oseas
- Name - Osimund
- Name - Osmund
- Name - Oswald
- Name - Otger
- Name - Othilia
- Name - Othmar
- Name - Otmar
- Name - Otto
- Name - Ottone
- Name - Ours
- Name - Outril
- Name - Outrille
- Name - Oye