| Children |
| | 1. Julia Costigan, b. 1826, Kilkenny, Ireland  d. 1899 (Age 73 years) |
| | 2. Michael Costigan, b. 1827, Kilkenny, Ireland d. 1892 (Age 65 years) |
| | 3. Hon. John Costigan, b. 1 Feb 1835, St.-Nicolas, QC d. 29 Sep 1916, Ottawa, ON (Age 81 years) |
| | 4. Helen Costigan, b. 27 Mar 1839, Riviere du Loup, QC |
| | 5. Catherine Costigan, b. 23 Jul 1837, Riviere du Loup, QC |
| | 6. Thomas Costigan, b. 1 Mar 1842, Van Buren, ME |
| | 7. Guillaume (William) F. Costigan, c. 23 Sep 1843, St Bruno, Van Buren, ME d. 1882 (Age ~ 38 years) |
|
1807 - 1880 (73 years)