'Old Man' - Odetta
Odette - Oksana
Oksana - Oleg
Oleg Mutu - Olga
Olga - Oliver
Oliver - Olivia
Olivia - Olivier
Olivier - Omar
Omar - Onassis
Oncho - Orchestra

Orchestra - Orlando
Orlando - Oscar
Oscar - Osho
Oshri - Otis Lee
Otis Lon - Ove
Ove Kant - Óscar
Óscar - Øyvind