| Name | Birth date | Relationship with Robert Frei |
| Gerken, Claus | 07 Jul 1810 | 2nd great-granduncle of the wife |
| Gerken, Claus | 05 Jan 1845 | 1st cousin 3 times removed of the wife |
| Gerken, Claus | 17 Dec 1867 | Great-granduncle of the wife |
| Gerken, Cord | 29 Jan 1733/34 | 4th great-granduncle of the wife |
| Gerken, Cord | 22 Nov 1849 | 1st cousin 3 times removed of the wife |
| Gerken, Cordt | 06 Oct 1667 | 6th great-grandfather of the wife |
| Gerken, Craig Bruce | Private | 3rd cousin of the wife |
| Gerken, David James | Private | 1st cousin of the wife |
| Gerken, Denise | Private | 1st cousin once removed of the wife |
| Gerken, Diedrich | 31 Dec 1842 | 1st cousin 3 times removed of the wife |
| Gerken, Donald Charles | Private | 1st cousin of the wife |
| Gerken, Elisabeth | | 6th great-grandaunt of the wife |
| Gerken, Elizabeth (Betsy) | Private | 2nd cousin once removed of the wife |
| Gerken, Ella | 20 May 1892 | Grandaunt of the wife |
| Gerken, Eric Robert | Private | 1st cousin once removed of the wife |
| Gerken, Frederick Claus A. | 18 Jan 1888 | Grandfather of the wife |
| Gerken, Gary Robert | Private | 1st cousin of the wife |
| Gerken, Gertrud | Abt. 20 Jun 1803 | 1st cousin 4 times removed of the wife |
| Gerken, Gertrude A. | 03 Jul 1909 | 1st cousin twice removed of the wife |
| Gerken, Gesche | Abt. 13 Sep 1705 | 5th great-grandaunt of the wife |
| Gerken, Gretje | 08 Apr 1815 | 2nd great-grandaunt of the wife |
| Gerken, Hannah Marie | Private | 1st cousin once removed of the wife |
| Gerken, Heinrich | 18 Aug 1847 | 1st cousin 3 times removed of the wife |
| Gerken, Henry J. | 08 May 1882 | Granduncle of the wife |
| Gerken, Hinrich | Abt. 17 May 1717 | 5th great-granduncle of the wife |
| Gerken, Hinrich | 04 Apr 1748 | 4th great-grandfather of the wife |
| Gerken, Hinrich | 14 May 1769 | 3rd great-granduncle of the wife |
| Gerken, Hinrich | 03 Feb 1771 | 3rd great-granduncle of the wife |
| Gerken, Hinrich | 13 Dec 1804 | 1st cousin 4 times removed of the wife |
| Gerken, Hinrich | Abt. 12 Jun 1807 | 1st cousin 4 times removed of the wife |
| Gerken, Hinrich | 03 Feb 1811 | 1st cousin 4 times removed of the wife |
| Gerken, Hinrich (Henry) | 18 Jan 1820 | 2nd great-grandfather of the wife |
| Gerken, Jacqueline Ann | Private | 2nd cousin once removed of the wife |
| Gerken, Janet Ann | Private | 2nd cousin of the wife |
| Gerken, Jay Scott | Private | 3rd cousin of the wife |
| Gerken, Jean Ann | Private | 1st cousin of the wife |
| Gerken, Jeffrey | Private | 1st cousin once removed of the wife |
| Gerken, Jenna Leigh | Private | 1st cousin once removed of the wife |
| Gerken, Johann | 19 Oct 1787 | 1st cousin 5 times removed of the wife |
| Gerken, Johann | 12 Dec 1824 | 2nd great-granduncle of the wife |
| Gerken, Johann | 10 Jun 1859 | Great-granduncle of the wife |
| Gerken, John | 16 Aug 1864 | Great-granduncle of the wife |
| Gerken, John Adolph Christ (Jack) | 26 May 1884 | Granduncle of the wife |
| Gerken, John C. | 20 Dec 1904 | 1st cousin twice removed of the wife |
| Gerken, John Frederick | Private | 2nd cousin once removed of the wife |
| Gerken, Jost | 29 Jan 1778 | 3rd great-grandfather of the wife |
| Gerken, Jost | 16 Dec 1838 | 1st cousin 3 times removed of the wife |
| Gerken, Jost | 18 Jan 1853 | Great-grandfather of the wife |
| Gerken, Jost | 16 Jun 1863 | 1st cousin 3 times removed of the wife |
| Gerken, Jost | 07 Apr 1891 | Granduncle of the wife |