Surname type: Family Name
| Member | Alternative Name |
|---|---|
| James Patrick O'Gorman O'Gorman Mahon | James (James Patrick O'Gorman) Mahon (Family Name) |
| Sally Oppenheim | Sally (Sally) Viner (Family Name) |
| Diana Organ | Diana (Diana Mary) Pugh (Family Name) |
| John Ormelie | John (John) Campbell (Family Name) |
| Sandra Osborne | Sandra (Sandra Currie) Clark (Family Name) |
| Charles Augustus Ossulston | Charles (Charles Augustus) Bennett (Family Name) |
| William Oxmantown | William (William) Parsons (Family Name) |
| Henry William George Paget | Henry (Henry William George) Paget (Family Name) |
| Henry Palmerston | Henry (Henry) Temple (Family Name) |
| Henry Percy | Henry (Henry Algernon George) Percy (Family Name) |
| Percy | Algernon (Algernon George) Percy (Family Name) |
| John Ramsay | John (John William) Ramsay (Family Name) |
| James Andrew Broun Ramsay | James (James Andrew Broun) Ramsay (Family Name) |
| Beatrice Rathbone | Beatrice (Beatrice Fredericka) Clough (Family Name) |
| John Villiers Stuart Raynham | John (John Villiers Stuart) Townshend (Family Name) |
| Frederick Rendlesham | Frederick (Frederick) Thellusson (Family Name) |
| Frederick Brook Rendlesham | Frederick Brook (Frederick Brook) Thelluson (Family Name) |
| Mabel Ridealgh | Mabel (Mabel) Jewitt (Family Name) |
| Iris Robinson | Iris (Iris) Collins (Family Name) |
| Barbara Roche | Barbara (Barbara Maureen) Margolis (Family Name) |
| Marion Roe | Marion (Marion Audrey) Keyte (Family Name) |
| Lawrence John Lumley Ronaldshay | Lawrence (Lawrence John Lumley) Dundas (Family Name) |
| Royston | Charles (Charles Philip) Yorke (Family Name) |
| Joan Ruddock | Joan (Joan Mary) Anthony (Family Name) |
| Angela Rumbold | Angela (Angela Christina Rosemary) Jones (Family Name) |