| Name | Birth date | Relationship with Cynthia BERTRAND |
| LAGUARDIA, Rose Marie | 29 Sep 1956 | 3rd cousin once removed |
| LAGUARDIA, Vincent | 29 Oct 1937 | Husband of the 3rd cousin |
| LAGUARDIA, Vincent | 01 May 1960 | 3rd cousin once removed |
| LAMOTH, Ely | | 1st cousin once removed of the husband |
| LAMOTH, Olive | | 1st cousin once removed of the husband |
| LAMPHIER, C A | | Husband of the half great-grandaunt |
| LAMPHIER, Lena L | | Half 1st cousin twice removed |
| LAMPHIER, Mabel E | 16 Feb 1874 | Half 1st cousin twice removed |
| LANES, L | | Husband of the 2nd cousin 3 times removed |
| LANGE, Vicky Kay | 07 Nov 1960 | Wife of the 2nd cousin once removed |
| LANZI, Andrew | 27 Feb 1962 | Brother-in-law |
| LANZI, Melanie Elizabeth | 05 Jul 1994 | Niece |
| LANZI, Stephanie Sylvia | 16 Mar 1991 | Niece |
| LATHBURY, Daniel Paul | 31 Jan 1955 | 2nd cousin |
| LATHBURY, William | | Husband of the 1st cousin once removed |
| LATHROP, David C | | Husband of the 3rd great-grandaunt |
| LAVERS, Elsie Eleanor | | Wife of the 3rd cousin once removed |
| LAW, Mary | | Wife of the 1st cousin 4 times removed |
| LEALY, Ellen A | 05 Nov 1946 | Wife of the 1st cousin once removed |
| LEAR, Elsie | | Wife of the 2nd cousin 3 times removed |
| LECAVALIER, Albert | | Husband of the 2nd cousin 3 times removed |
| LEGER, Becky Jean | 17 Oct 1970 | 1st cousin once removed of the husband |
| LEGER, Jennifer | 20 Jun 1973 | 1st cousin once removed of the husband |
| LEHMANN, Wanda | | Wife of the 2nd cousin once removed |
| LEHMER, Susanna | | Wife of the 3rd cousin 6 times removed |
| LEIBOWITZ, Carol | 14 Jan 1954 | 3rd cousin of the husband |
| LEIBOWITZ, Laura | 13 Nov 1958 | 3rd cousin of the husband |
| LEONARD, Christopher | 05 Jun 1988 | 1st cousin once removed of the husband |
| LEONARD, Nicholas | 26 Apr 1986 | 1st cousin once removed of the husband |
| LEREW, Abraham | Abt 1794 | Husband of the half 4th great-grandaunt |
| LEREW, Benjamin Douglas | 05 Jul 1983 | 4th cousin |
| LEREW, Larry David | | Husband of the 3rd cousin once removed |
| LEREW, Timothy David | 13 Apr 1980 | 4th cousin |
| LEROY, Nelson | | Husband of the 2nd cousin 3 times removed |
| LESSARD, Alice Rose | Abt 1932 | Half aunt of the husband |
| LESSARD, Marie Lea (Pat) | 06 Nov 1933 | Half aunt of the husband |
| LEWIS, Jeffery Michael | 14 May 1986 | 3rd cousin once removed of the husband |
| LEWIS, Justin | 31 Aug 1989 | 3rd cousin once removed of the husband |
| LIBBEY, Constance | 20 Nov 1931 | Wife of the 3rd cousin once removed |
| LICHTENSTEIN, Herbert | | Husband of the 1st cousin twice removed |
| LIERMAN, Bill (Frederick) | 26 Nov 1903 | 1st cousin twice removed |
| LIERMAN, Catherine | Abt 1925 | 1st cousin twice removed |
| LIERMAN, Helen | 30 Jun 1910 | 1st cousin twice removed |
| LIERMAN, Lawrence H | 09 Dec 1912 | 1st cousin twice removed |
| LIERMAN, Louis | 14 Nov 1861 | Husband of the great-grandaunt |
| LIERMAN, Marvel | 21 Feb 1896 | 1st cousin twice removed |
| LIERMAN, Ralph | 30 Oct 1897 | 1st cousin twice removed |
| LIERMAN, Walter | 01 Nov 1906 | 1st cousin twice removed |
| LINGLEY, Walter | | Husband of the 1st cousin twice removed |
| LINK, Andrea Kathryn | 18 Jan 1966 | 3rd cousin once removed of the husband |