| O'Neill, Marc Marie Patrick | 29-10-1909 | 18-07-1956 | |
| Obitz, René André | 09-03-1908 | 23-03-1945 | |
| Oddo, Paul Jean Marie Gabriel | 24-11-1917 | 21-03-2000 | |
| Ogrodzki, Jerzy Marian | 08-03-1912 | 28-06-1940 | |
| Olivier Le Sann | | 31-05-1940 | |
| Olivier, Pierre Jean Alexandre | 12-06-1904 | 29-04-1945 | |
| Olmo, Jean-François | 00-00-1910 | | |
| Omer, Guilbert | | 12-12-1918 | |
| Orbello, Jean "Olivier" | 18-11-1902 | 15-09-1953 | |
| Ornano, d', Philippe Antoine | 17-01-1784 | 13-10-1863 | |
| Orsini, Marcel Louis Théodore | 01-02-1911 | 24-11-1999 | more |
| Ortoli, Paul Ange Philippe | 19-09-1900 | 29-03-1979 | more |
| Oubre, Louis Augustin François | 19-01-1885 | 24-01-1942 | |
| Ourandene Ait-Arkoub | | 31-01-1945 | |
| Ovise, Marius Charles | 06-04-1913 | 11-05-1940 | |