Thomas Ormston to Benjamin Orrick - 1881 Census household returns
- Thomas Ormston to Edward Ornsby
- Elizabeth Ornsby to George Orpe
- James Orpe to Robert Orpen
- Robert Orpen to ? Y Orpin
- Albert Orpin to Mary Ann Orpin
- Robert Orpin to Sarah Orpwood
- Thomas Orpwood to Alex Orr
- Alex Orr to Andrew Orr
- Andrew Orr to Catherine Orr
- Catherine Orr to David Orr
- David Orr to Elizabeth Orr
- Elizabeth Orr to George Orr
- George Orr to Hugh Tengly Orr
- Isabella Orr to James Orr
- James Orr to James Orr
- James Orr to James Orr
- James Orr to Jane Orr
- Jane Orr to John Orr
- John Orr to John Orr
- John Orr to John Orr
- John Orr to John Orr
- John Orr to Margaret Orr
- Margaret Orr to Mary Orr
- Mary Orr to Peter Orr
- Peter Orr to Robert Orr
- Robert Orr to Robert A Orr
- Robert C Orr to Thomas Orr
- Thomas Orr to Thomas Orr
- Thomas Orr to William Orr
- William Orr to William Orr
- William Orr to William Orr
- William Orr to William Orram
- Seth Orrange to Christopher Orrell
- Daniel Orrell to Henry Orrell
- Henry Orrell to Jane M Orrell
- John Orrell to Joseph Orrell
- Joseph Orrell to Robert Orrell
- Robert Orrell to Thomas Orrell
- Thomas G Orrell to William Orren
- John Orress Or Orriss to Benjamin Orrick