List of People
| Display Name | Surnames | Given Names | Gender | Nationality | |
|---|---|---|---|---|---|
| OBYKHOD Kyrylo | Obykhod | Kyrylo | M | UKR | |
| O'BYRNE Amy | O'Byrne | Amy | F | IRL | |
| O'BYRNE Hannah | O'Byrne | Hannah | F | IRL | |
| O'BYRNE Katie | O’Byrne | Katie | F | ||
| O'CALLAGHAN Miriam | O'Callaghan | Miriam Margaret | F | IRL | |
| OCAÑA Jorge | Ocaña | Jorge | M | ESP | |
| O'CARROLL Geraldine | O'Carroll | Geraldine | F | IRL | |
| OCHELLO Gianni | Ochello | Gianni | M | GIB | |
| OCHS Maximilian | Ochs | Maximilian | M | GER | |
| O’CONNELL Gillian | O’Connell | Gillian | F | IRL | |
| O'CONNOR Ellie | O'Connor | Ellie | F | GBR | |
| O'CONNOR Gary | O'Connor | Gary | M | IRL | |
| O'CONNOR Ray | O'Connor | Ray | M | IRL | |
| O'CONNOR Simon | O'Connor | Simon | M | IRL | |
| O'CONNOR Michael | O'Connor | Michael | M | IRL | |
| O'CONNOR Sam | O'Connor | Sam | M | IRL | |
| O'CONNOR Catherine | O'Connor | Catherine | F | ||
| O’CONNOR Eleanor | O’Connor | Eleanor | F | SCO | |
| ODDY Joe | Oddy | Joe | M | ENG | |
| ODEKERKEN Matthijs | Odekerken | Matthijs | M | NED |