Robert Ord to Samuel Orme - 1881 Census household returns
- Robert Ord to Thomas Ord
- Thomas Ord to Walter ? Ord
- William Ord to William R Ord
- William S Ord to George Ordidge
- Harriett Ordidge to James Ordish
- James Ordish to Harriet Ordoyno
- Letitia Ordridge to Thomas Ore
- William Ore to Benjamin Oresett
- William Oreston to Edward Orford
- Edward Orford to James Orford
- James Orford to Mary A Orford
- Mary A Orford to William G Orford
- William H Orford to Charles Organ
- Charles Organ to Emily E Organ
- Enoch Organ to Henry Organ
- Henry Organ to John Organ
- John Organ to Samuel Organ
- Samuel C Organ to William Organ
- William Organ to Samuel Orgee
- Samuel Orgee to James Orgill
- Jessie Orgill to George Orgles
- James Orgles to Sarah Oriel
- Stephen Oriel to John G Orkford
- William Orkley to George Orland
- George Orland to John Orley
- John Orley to Charles Orman
- Charles Orman to Joseph Orman
- Margaret Orman to Henry Ormand
- James Ormand to James Ormandy
- Jane M Ormandy to Henry Ormanroyd
- James Ormanroyd to Arthur Orme
- Arthur Orme to Edward Orme
- Edward Orme to George Orme
- George Orme to Harriet Orme
- Harriet Orme to James Orme
- James Orme to John Orme
- John Orme to John Orme
- John Orme to Joshua C Orme
- Lonne ? Orme to Peter Orme
- Philip Orme to Samuel Orme