M. O'Callaghan |
| Roll of Honour Ref. | |
| Memorial Ref. | 1980 |
| Surname | O'Callaghan |
| Initials | M. |
| Rank | |
| Ship or Regiment | |
| Date of Death | |
| Age | |
| Place of Death | |
| Remarks | |
| Parish | Plymouth |
| Memorial Type | War Memorial |
| Memorial Location | Plymouth, Church of St. Aubyn (ex Church of St. Mary) |
| Contributor | PB |