Boy's name with O
- Oliver
- Oscar
- Owen
- Omar
- Orlando
- Ollie
- Otto
- Olaf
- Orion
- Oswald
- Otis
- Olive
- Olivier
- Orville
- Octavio
- Odin
- Obama
- Oman
- Osvaldo
- Osman
- Oren
- Osama
- Oleg
- Oran
- Oden
- Orin
- Orson
- Oskar
- Octavian
- Ole
- Orpheus
- Oakley
- OGGY
- Omen
- Olsen
- Oslo
- Ola
- Orwell
- Ozzie
- Obi
- Opal
- Osiris
- Ocean
- Orland
- Odell
- Olson
- Olívio
- Onyx
- ORRY
- Odis
- Oak
- Olin
- Oedipus
- Octave
- Orrin
- Odysseus
- OSHO
- Oberon
- Obadiah
- Otter
- Osmond
- Omid
- Orly
- Olga
- O'Neil
- Owain
- Osborn
- Olav
- Oxford
- Olen
- Ogden
- OMA
- Oneal
- Osama Bin Laden
- Oven
- October
- Orlando Bloom
- Oval
- Omega
- O'Brien
- Orton
- Oppenheimer
- Oily
- Ono
- Ontario
- OJ Simpson
- Oakland
- Osborne
- Oro
- Oleander
- Organ
- Ovid
- Ota
- Obey
- Ortho
- Ora
- Onno
- Ormond
- Omri
- Oriel
The words in the list Boy's name with O come from players of the word game Categories game.