John Olvin to Alexander Oman - 1881 Census household returns
- John Olvin
- George Olway
- Walter P Olway
- William Olway
- James Olwell
- Charles Olwen
- James Olwill
- Robert W Olyed
- Mary A Olyet
- Edward J Olyett
- Mary Olyett
- Robert Wm Olyett
- Joseph L Olyff
- Thomas Olyott
- Thomas Hawkins Olyott
- Frances E Olzanski
- Harriett Olzenbrook
- Agnes Om
- Bethia Om
- William ? Om (?)
- Elizabeth Omailligh
- Mary Omalia
- Anthony Omalley
- James Omalley
- James Omalley
- John Omalley
- Michael Omalley
- Michael J Omalley
- Patrick C Omalley
- Peter Omalley
- Michael Omalloy
- Andrew Omally
- Gamble Omally
- Michael Omally
- Norah Omally
- Michael Omaly
- Oman
- Agnes Oman
- Agnes Oman
- Alexander Oman