Thomas G O'reilly to Timothy O'riordan - 1881 Census household returns
- Thomas G O'reilly
- Timothy O'reilly
- Walter P O'reilly
- William O'reilly
- William O'reilly
- William O'reilly
- John O'reily
- John O'reily
- Julia O'reily
- Mary O'reily
- John O'rell
- Joseph O'rell
- John O'relly
- George O'rey
- John O'rieley
- Michael O'rielley
- Patrick O'rielley
- Ann O'rielly
- Charles O'rielly
- Daniel O'rielly
- Dennis O'rielly
- John O'rielly
- John O'rielly
- Michael O'rielly
- Philip O'rielly
- John O'rielly Marshall
- Ellen O'riely
- Edward O'riley
- Helen O'riley
- Joseph O'riley
- Michael O'riley
- Peter O'riley
- Terrance O'riley
- Thomas O'riley
- Thomas O'riley
- Thomas O'riley
- William D O'riley
- Peter O'rilley
- John P O'riordan
- Timothy O'riordan