| Name | Birth date | Relationship with Sean Mulcahey |
| Chandler, Wilbur Jacob | November 01, 1877 | Husband of the great-grandaunt |
| Charles, Etienne | | 9th great-grandfather |
| Charles, Jeane | Abt. 1645 | 9th great-grandmother |
| Charles, Mar. | | 8th great-grandmother |
| Charon, Antoine | Bef. 1783 | 7th great-grandfather |
| | | Husband of the 1st cousin 9 times removed |
| Charon, Antoine | Bef. 1798 | 6th great-grandfather |
| | | 2nd cousin 8 times removed |
| Charon, Catherine | Bef. 1768 | 8th great-grandmother |
| | | 8th great-grandaunt |
| Charon, Charles | | 8th great-grandfather |
| Charon, Jean | Bef. 1768 | 8th great-grandfather |
| | | 8th great-granduncle |
| Charon, Marie-Madeleine | Bef. 1813 | 5th great-grandmother |
| | | 3rd cousin 7 times removed |
| | | Wife of the 2nd cousin 7 times removed |
| | | Wife of the 3rd cousin 7 times removed |
| Charon, Marie-Theresa | Bef. 1783 | 7th great-grandmother |
| | | 1st cousin 9 times removed |
| Charon, Pierre | | 9th great-grandfather |
| Charpentier, Jean | Abt. 1685 | 8th great-grandfather |
| Charpentier, Jean | Abt. 1715 | 7th great-grandfather |
| Charpentier, Marie-Catherine | Abt. 1745 | 6th great-grandmother |
| Charpentier, Sip. | Abt. 1655 | 9th great-grandfather |
| Charron, Pierre | Bef. 1753 | 9th great-grandfather |
| Chartier, Jeane | Abt. 1695 | 9th great-grandmother |
| Chaunreau, Marg. | Abt. 1670 | 9th great-grandmother |
| Chauvix, M.-M. | Abt. 1670 | 9th great-grandmother |
| Chicoine, Madeleine | Bef. 1753 | 9th great-grandmother |
| Chojnacki, Cathy | | Wife of the 1st cousin once removed |
| | | Wife of the 8th cousin once removed |
| | | Wife of the 9th cousin |
| | | Wife of the 8th cousin twice removed |
| | | Wife of the 9th cousin once removed |
| Cleriu, Catherine | | 9th great-grandmother |
| Cleveland, Marjorie | | Wife of the granduncle |
| Cloutier, Jean | Abt. 1630 | 9th great-grandfather |
| Cloutier, Marie-Louise | 1687 | 8th great-grandmother |
| Colantonio, Timothy | | Husband of the 2nd cousin once removed |
| Colin, Marie-Rose | | 9th great-grandmother |
| Comeau, Cecelia | | Wife of the half 1st cousin twice removed |
| Conley, Emily | December 17, 1997 | 2nd cousin |
| Conley, William Joseph | March 29, 1930 | Husband of the grandaunt |
| Conley, William Joseph | July 23, 1967 | 1st cousin once removed |
| Connolly, Jeffrey Robert | June 30, 1972 | 1st cousin once removed |
| Connolly, Kevin Joseph | March 25, 1975 | 1st cousin once removed |
| Connolly, Robert Patrick | October 30, 1944 | Husband of the grandaunt |
| Còté, Marie-Ch. | Abt. 1660 | 9th great-grandmother |
| Creighton, Dolly | | Wife of the 2nd great-granduncle |
| Crettel, Elisabeth | Abt. 1655 | 9th great-grandmother |