| Name | Birth date | Relationship with Sean Mulcahey |
| | | 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 |
| Sayoomporn | | 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 |
| Schmidlin, Anne Marie | September 05, 1960 | 2nd cousin once removed |
| Schmidlin, Edward Michael | February 24, 1962 | 2nd cousin once removed |
| Schmidlin, Fredrick W. | August 28, 1925 | Husband of the 1st cousin twice removed |
| Schmidlin, Janet Elizabeth | February 02, 1964 | 2nd cousin once removed |
| Schoolcraft, Ernest H. | | Husband of the great-grandaunt |
| Selle, Marie-Françoise | | 9th great-grandmother |
| Senécal, Gen. | Bef. 1783 | 7th great-grandmother |
| | | 1st cousin 8 times removed |
| | | 1st cousin 9 times removed |
| Senécal, Nic. | | 9th great-grandfather |
| Senécal, Nic. | Abt. 1725 | 8th great-grandfather |
| | | Husband of the 7th great-grandaunt |
| | | Husband of the 8th great-grandaunt |
| Sevestre, Charles | Abt. 1610 | 10th great-grandfather |
| Sevestre, Marguerite | 1632 | 9th great-grandmother |
| Shane | | 2nd cousin once removed |
| Shanley, Catherine Mary | March 15, 1986 | Half 3rd cousin |
| Shanley, Colleen Agnes | January 03, 1952 | Half 2nd cousin once removed |
| Shanley, Daniel Joseph III | June 28, 1946 | Half 2nd cousin once removed |
| Shanley, Daniel Joseph, Jr. | January 09, 1923 | Husband of the half 1st cousin twice removed |
| Shanley, Eva Marie | October 12, 1969 | Half 3rd cousin |
| Shanley, Gail Anne | June 18, 1950 | Half 2nd cousin once removed |
| Shanley, Husband | | Husband of the half 2nd cousin once removed |
| Shanley, Mary Elizabeth | December 28, 1947 | Half 2nd cousin once removed |
| Shanley, Terrie Lea | September 19, 1959 | Half 2nd cousin once removed |
| Shanley, Walter Anthony | March 07, 1957 | Half 2nd cousin once removed |
| Shonio, Florence | July 12, 1886 | Wife of the great-grandfather |
| Slayton, Mary | | Wife of the granduncle |
| Smith, Leona | | Wife of the 1st cousin twice removed |
| Son | | 2nd cousin once removed |
| St. Denis, Anne | | 9th great-grandmother |
| Stephanie | | 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 |
| Sullivan, Laurie | February 13, 1974 | 3rd cousin once removed |
| Sullivan, Paul | | Husband of the 2nd cousin twice removed |
| Sullivan, Paul | October 06, 1976 | 3rd cousin once removed |
| Targer, Dan. | Abt. 1655 | 9th great-grandfather |
| Targer, Mar. | Abt. 1685 | 8th great-grandmother |