List of People
| Display Name | Surnames | Given Names | Gender | Nationality | |
|---|---|---|---|---|---|
| O'BRIEN Paul | O'Brien | Paul | M | IRL | |
| O'BRIEN Fiona | O'Brien | Fiona | F | TTO | |
| O'BRIEN Gladys | O'Brien | Gladys | F | NZL | |
| O'BRIEN Jordi | O'Brien | Jordi | M | TTO | |
| O’BRIEN Roisin | O’Brien | Roisin | F | IRL | |
| OBST Mateusz | Obst | Mateusz | M | POL | |
| OBUAKUDE Rita | Obuakude | Rita | F | NGR | |
| OBUKHOV Leonid | Obukhov | Leonid | M | RUS | |
| OBUKOWHO Faith | Obukowho | Faith | F | NGR | |
| OBUNYASI Daniel | Obunyasi | Daniel Nyambaka | M | KEN | |
| O'BYRNE Hannah | O'Byrne | Hannah | F | IRL | |
| O'BYRNE Yvonne | O'Byrne | Yvonne | F | IRL | |
| O'CALLAGHAN Jason | O'Callaghan | Jason | M | ENG | |
| OCAMPO Jesica | Ocampo | Jesica | F | ARG | |
| OCAMPO Martin | Ocampo Mendez | Martin | M | URU | |
| OCAÑA Jorge | Ocaña | Jorge | M | ESP | |
| O'CARROLL Niall | O'Carroll | Niall | M | IRL | |
| OCHAN Bosco | Ochan | Bosco | M | UGA | |
| OCHAYI Emmanuel | Ochayi | Emmanuel Joseph | M | NGR | |
| OCHAYI Emmanuel | Ochayi | Emmanuel | M | NGR |