Elizabeth Irwin to Mary Isaac - 1881 Census household returns
- Elizabeth Irwin to George Irwin
- George Irwin to Henry Irwin
- Henry Irwin to James Irwin
- James Irwin to Jane Irwin
- Jane Irwin to John Irwin
- John Irwin to John Irwin
- John Irwin to Joseph Irwin
- Joseph Irwin to Margaret Irwin
- Margaret Irwin to Matthew Irwin
- Matthew Irwin to Robert Irwin
- Robert Irwin to Thomas Irwin
- Thomas Irwin to Thomas W Irwin
- William Irwin to William Irwin
- William Irwin to William R Irwin
- Willing Irwin to Abraham Isaac
- Abraham Isaac to Ann Isaac
- Ann E Isaac to Charles A Isaac
- Charles E Isaac to David Isaac
- David Isaac to Edward Isaac
- Edward Isaac to Elizabeth Isaac
- Elizabeth Isaac to Frederick Isaac
- Frederick Isaac to George Isaac
- George Isaac to Henry Isaac
- Henry Isaac to Israel Isaac
- Ivor Isaac to James Isaac
- James Isaac to John Isaac
- John Isaac to John Isaac
- John Isaac to John Isaac
- John Isaac to John K Isaac
- John S Isaac to Luke Isaac
- Lydia Isaac to Mary Isaac