Mary Isaac to Justin Isbert - 1881 Census household returns
- Mary Isaac to Morris Isaac
- Moses Isaac to Richard B Isaac
- Richard H Isaac to Sarah Isaac
- Sarah Isaac to Thomas Isaac
- Thomas Isaac to Thomas Hewson Isaac
- Thomas I Isaac to William Isaac
- William Isaac to William Isaac
- William Isaac to William Isaac
- William A Isaac to Abraham Isaacs
- Abraham Isaacs to Ann Isaacs
- Ann Isaacs to Charles E Isaacs
- Charles R Isaacs to Elias Isaacs
- Elias Isaacs to Frederick H Isaacs
- George Isaacs to Harry Isaacs
- Henry Isaacs to Isaac Isaacs
- Isaac Isaacs to Jane Isaacs
- Jane Isaacs to John Isaacs
- John Isaacs to Kitty Isaacs
- Lamert Isaacs to Louisa Isaacs
- Lydia Isaacs to Morris Isaacs
- Morris Isaacs to Rachel Isaacs
- Rachel Isaacs to Samuel Isaacs
- Samuel Isaacs to Susanna Isaacs
- Thomas Isaacs to William Isaacs
- William Isaacs to Elizabeth Isaacson
- Elizabeth H Isaacson to Joseph Isaacson
- Joseph Isaacson to William Isaas
- George Isaason to Auburn Isacke
- Charles Isacke to Frederic Isant
- Ada J Isard to Charles Isbell
- Charles Isbell to Justin Isbert