| Surname: | O'Brien |
| Initials: | D |
| Rank: | 2nd Lieutenant |
| Army Number: | 195191 |
| Notes: | CMP. Formerly Coldstream Guards, transferred to CMP. 6/4/71 discharged to Commission. London Gazette 35265, page 5148, dated 5/9/41. General List. The undermentioned to be 2/Lt's: 10/7/41, Serjt, Denis O'Brien (195191) from CMP. |