Name
- Newnham, Anthony, bookseller, of Wareham1
- Nichols, John Beverley, writer1
- Nicolson, Lionel Benedict, art historian1
- Noel-Baker, E. D.1
- Norman, Sylvia1
- Norrington, Arthur Lionel Pugh, President Trinity College Oxford1
- O'Connor, Mary, of Paris1
- O'Faolain, Sean, Irish writer1
- O'Keefe, Martha J., wife of John A O'Keefe1
- O'Malley, Mary Dolling Sanders, alias 'Ann Bridge'; author1
- O'Shea, Juliet, of Curtis Brown Ltd1
- Oakley, James al. Michael, Brother; OSB; of Belmont Abbey1
- Oldham, J. Basil, librarian, Shrewsbury School1
- Oldridge, Diana, of Dursley, county Glos, fl 1922-19401
- Olivier, Laurence Kerr, Baron Olivier of Brighton, actor and director, 1907-19891
- Ong, Walter J., Fr; SJ1
- Onslow, William Arthur Bampfylde, 6th Earl of Onslow, KBE; MC1
- Osborne, John James, playwright, 1929-19941
- Pakenham, Christine Patti, née Trew; wife of 6th Earl of Longford1
- Pakenham, Elizabeth, author; wife of Frank Pakenham, 7th Earl of Longford, 1906-20021