Benjamin Orrick to George Osborn - 1881 Census household returns
- Benjamin Orrick to John Orridge
- John Orridge to Christopher Orrin
- Ebenezer Orrin to Daniel Orris
- Eliza Orris to George Orriss
- George Orriss to William Orriss
- William Orriss to James Orrock
- Jane Orrock to William Orsben
- Frederick Orsbone to Elizabeth Orsborne
- Elizabeth Orsborne to Elijah Orsler
- Jeremiah Orsler to Valentine Orson
- William Orson to Albert Orton
- Albert H Orton to Charles Orton
- Charles Orton to Edward Orton
- Edward Orton to George Orton
- George Orton to Henrietta A Orton
- Henry Orton to James Orton
- James Orton to John Orton
- John Orton to John Orton
- John Orton to Joseph Orton
- Joseph Orton to Mary Orton
- Mary A Orton to Robert Orton
- Robert Orton to Thomas Orton
- Thomas Orton to Thomas Orton
- Thomas Orton to William Orton
- William Orton to William Orton
- William Orton to James Orum
- Jesse Orum to Walter J Orvis
- William Orvis to Ernest H Orwin
- Frederick J Orwin to William Orwin
- William Orwin to John T Osbaldeston
- Joseph Osbaldeston to William Osbaldiston
- William Osbaldiston to Albert E Osbon
- Alfred Osbon to Alfred Osborn
- Alfred Osborn to Benjamin Osborn
- Benjamin Osborn to Charles Osborn
- Charles Osborn to Cornelius E Osborn
- Daniel Osborn to Edward Osborn
- Edward Osborn to Elizabeth Osborn
- Elizabeth Osborn to F A Osborn
- Fanny Osborn to George Osborn