James O`brin to George Oaden - 1881 Census household returns
- James O`brin
- John O`connell
- James O`connor
- John O`donald
- O`donnell
- Ann O`donnell
- Bridget O`donnell
- Denis O`donnell
- Isabella O`donnell
- John O`donnell
- John O`donnell
- Michael O`donnell
- Catherine O`hara
- Jeremiah O`kane
- Edward O`keefe
- Patrick O`leary
- Ann O`neil
- John O`neil
- Joseph O`neil
- John O`neill
- John O`neill
- William O`neill
- Charles O`niel
- Patrick O`rafferty
- Arthur Oa?
- Joseph Oabank
- Thomas Oabin
- Patrick Oachanghaney
- James Oachterlong
- Samuel Oackley
- James Oad
- John Oad
- Alfred Oade
- Andrew Oade
- Ann Oade
- Benjamin Oade
- Fanny Oade
- Henry Oade
- William Oade
- George Oaden