| Name | Birth date | Relationship with Sean Mulcahey |
| Cassidy, Louise W. | August 21, 1895 | Wife of the half great-granduncle |
| Cechenni, Frances | | Wife of the 1st cousin once removed |
| Cesaitis, Adam John | October 06, 1923 | Husband of the grandaunt |
| | | Husband of the 7th cousin twice removed |
| | | Husband of the 8th cousin once removed |
| | | Husband of the 7th cousin 3 times removed |
| | | Husband of the 8th cousin twice removed |
| Cesaitis, Donald John | May 14, 1953 | 1st cousin once removed |
| | | 8th cousin once removed |
| | | 9th cousin |
| | | 8th cousin twice removed |
| | | 9th cousin once removed |
| Cesaitis, Mark Ernest | January 08, 1963 | 1st cousin once removed |
| | | 8th cousin once removed |
| | | 9th cousin |
| | | 8th cousin twice removed |
| | | 9th cousin once removed |
| Cesaitis, Patty Ann | October 05, 1951 | 1st cousin once removed |
| | | 8th cousin once removed |
| | | 9th cousin |
| | | 8th cousin twice removed |
| | | 9th cousin once removed |
| Chagnon, Elisabeth | Bef. 1828 | 4th great-grandmother |
| | | 3rd cousin 6 times removed |
| | | 4th cousin 6 times removed |
| | | Wife of the 4th cousin 5 times removed |
| | | Wife of the 4th cousin 6 times removed |
| Chagnon, François | Bef. 1768 | 8th great-grandfather |
| | | Husband of the 8th great-grandaunt |
| Chagnon, Joseph | Bef. 1798 | 6th great-grandfather |
| | | 1st cousin 8 times removed |
| | | 2nd cousin 8 times removed |
| | | Husband of the 2nd cousin 8 times removed |
| Chagnon, Joseph | Bef. 1813 | 5th great-grandfather |
| | | 2nd cousin 7 times removed |
| | | 3rd cousin 7 times removed |
| | | Husband of the 3rd cousin 7 times removed |
| Chagnon, Pierre | | 9th great-grandfather |
| Chagnon, Pierre | Bef. 1783 | 7th great-grandfather |
| | | 1st cousin 9 times removed |
| | | Husband of the 7th great-grandaunt |
| Chaillé, Jean | | 8th great-grandfather |
| Chaillé, Jean-Baptiste | Bef. 1783 | 7th great-grandfather |
| | | Husband of the 1st cousin 9 times removed |
| Chaillé, Marie-Char. | Bef. 1798 | 6th great-grandmother |
| | | 2nd cousin 8 times removed |
| | | Wife of the 2nd cousin 7 times removed |
| | | Wife of the 2nd cousin 8 times removed |
| Chaillé, Mathew | | 9th great-grandfather |
| Chandler, Ella | Abt. 1900 | Wife of the great-granduncle |