Personer O
| Olsen, Keith | Person | |
| Olsson (Lehtinen), Virve | Person | |
| Olsson, Dan-Eje | Person | |
| Olsson, Nils | Person | |
| Omur, Bilge | Person | |
| Omura, Hiromi | Person | |
| Oney, Tai | Person | |
| Oniani, George | Person | |
| Onkinen, Uno | Person | |
| Ontronen, Anu | Person | |
| Onttonen, Selma | Person | |
| Opie, Julian | Person | |
| Opolais, Kristine | Person | |
| Orama, Heikki | Person | |
| Oramo, Anna-Maaria | Person | |
| Oramo, Sakari | Person | |
| Oras, Toivo | Person | |
| Orasmaa, Anna | Person | |
| Oravisto, Jaana | Person | |
| Orff, Carl | Person |