| Name | Birth date | Relationship with Sean Mulcahey |
| Deshayes, Marg. | Bef. 1753 | 9th great-grandmother |
| Desmarets, Marie-Reneé | | 6th great-grandmother |
| Desmarets, Paul | | 8th great-grandfather |
| Desmarets, Paul | | 9th great-grandfather |
| Desmarets, Pierre | | 7th great-grandfather |
| Destroismaisone, Jacques | Abt. 1660 | 9th great-grandfather |
| Destroismaisone, Jacques | Abt. 1690 | 8th great-grandfather |
| Destroismaisone, Marie | Abt. 1660 | 9th great-grandmother |
| Destroismaisone, Marie-Françoise | Abt. 1720 | 7th great-grandmother |
| DiStefano, Salvatore Paul | February 21, 1958 | Husband of the 1st cousin once removed |
| | | Husband of the 8th cousin once removed |
| | | Husband of the 9th cousin |
| | | Husband of the 8th cousin twice removed |
| | | Husband of the 9th cousin once removed |
| DiStefano, Salvatore Ray | June 02, 1988 | 2nd cousin |
| | | 9th cousin |
| | | 9th cousin once removed |
| | | 10th cousin |
| DiStefano, Son2 | Abt. 1995 | 2nd cousin |
| | | 9th cousin |
| | | 9th cousin once removed |
| | | 10th cousin |
| Dobzinski, Kathryn | | Wife of the 2nd cousin once removed |
| Du Bois, Jean | Abt. 1630 | 9th great-grandfather |
| Du Bois, Louise | | 9th great-grandmother |
| Dubois, Genevieve | Abt. 1670 | 8th great-grandmother |
| Duchesne, Madeleine | Abt. 1660 | 9th great-grandmother |
| Duchesne, Nic. | | 9th great-grandmother |
| Dunn, Agnes C. | 1855 | 2nd great-grandaunt |
| Dunn, Francis O. | 1867 | 2nd great-granduncle |
| Dunn, George F. | 1869 | 2nd great-granduncle |
| Dunn, James A. | April 23, 1874 | 2nd great-grandfather |
| Dunn, Matthew | 1831 | 3rd great-grandfather |
| Dunn, Mavis Claire | January 30, 1905 | Great-grandmother |
| Dunn, Peter Joseph | 1871 | 2nd great-granduncle |
| Dunn, Son | November 05, 1903 | Great-granduncle |
| Dunn, Thomas F. | September 16, 1875 | 2nd great-granduncle |
| Dunn, William P. | 1858 | 2nd great-granduncle |
| Dupont, Fançois | Abt. 1630 | 9th great-grandfather |
| Dupont, Louis | Abt. 1670 | 8th great-grandfather |
| Dupont, Marie-Anne | Abt. 1720 | 7th great-grandfather |
| Dupont, Marie-Josephte | Abt. 1745 | 6th great-grandmother |
| Dupre, Anne | Abt. 1650 | 9th great-grandmother |
| Durand, Marg. | Bef. 1783 | 7th great-grandmother |
| Durand, Pierre | Abt. 1695 | 9th great-grandfather |
| Durand, Pierre | Bef. 1768 | 8th great-grandfather |
| Dwyer, Brennan Martin | March 27, 1996 | 1st cousin |
| Dwyer, Charles Thomas | September 19, 1963 | Husband of the aunt |
| Dwyer, James | | Husband of the 1st cousin twice removed |
| Dwyer, Margaret | | 2nd cousin once removed |