| Name | Birth date | Relationship with Marian Yancey |
| Klimkiewicz, Lottie | | 5th cousin once removed |
| Klimkiewicz, Matylda | 1862 | Wife of the 1st cousin 3 times removed |
| Klimkiewicz, Teodor | February 1924 | 5th cousin once removed |
| Klimkiewicz, Walter | Abt. 1889 | Husband of the 4th cousin twice removed |
| Kloss, Hazel | | Wife of the 5th cousin once removed |
| Knapp, Viola | | Wife of the 1st cousin twice removed |
| Koeplin, Charles Francis | November 01, 1890 | Husband of the 1st cousin twice removed |
| Koeplin, Virginia Lee | | 2nd cousin once removed |
| Koeplin, Virginia Lee | | 2nd cousin once removed |
| Kolodziejska, Józefa | March 20, 1873 | 2nd cousin twice removed |
| Kolodziejski, ??? | 1885 | 2nd cousin twice removed |
| Kolodziejski, Anna | June 21, 1878 | 2nd cousin twice removed |
| Kolodziejski, Anna | July 22, 1889 | 2nd cousin twice removed |
| Kolodziejski, Balbina | March 27, 1876 | 2nd cousin twice removed |
| Kolodziejski, Franciszka | January 15, 1881 | 2nd cousin twice removed |
| Kolodziejski, Jan | June 09, 1886 | 2nd cousin twice removed |
| Kolodziejski, Józef | February 09, 1846 | Husband of the 1st cousin 3 times removed |
| Kolodziejski, Stanislawa | April 13, 1883 | 2nd cousin twice removed |
| Kolodziejski, Wincenty | January 18, 1871 | 2nd cousin twice removed |
| Komosinska, Karólina | November 02, 1843 | 2nd cousin 3 times removed |
| Komosinski, Jan | June 02, 1846 | 2nd cousin 3 times removed |
| Komosinski, Stanislaw | 1823 | Husband of the 1st cousin 4 times removed |
| Kopeck, Bertha | | Wife of the 5th cousin once removed |
| Kopp, Darlene | | 3rd cousin once removed of the husband |
| Kopp, Gary Max | | 3rd cousin once removed of the husband |
| Kopp, Karen Kay | | 3rd cousin once removed of the husband |
| Kostan~ski, John | | Husband of the half 3rd cousin 3 times removed |
| Kostrzebski, ??? | | Husband of the 1st cousin twice removed |
| Kostrzewski, Maria | | Wife of the half 5th cousin once removed |
| | | Wife of the 6th cousin |
| Kowalska, Marion | | 6th cousin |
| Kowalski, Gregory | | 6th cousin |
| Kowalski, Jan | | Husband of the 5th cousin once removed |
| Kowalski, Jan | | 6th cousin |
| Kowalski, Martin | | 6th cousin |
| Kowalski, Steven | | 6th cousin |
| Krisko, George | | Husband of the 5th cousin once removed |
| Krstovski, Zorica | | Wife of the 6th cousin once removed |
| Krusinska, Maryanna | Bet. 1791 - 1795 | 3rd great-grandmother |
| Krysiak, Adam | 1809 | 2nd cousin 4 times removed |
| Krysiak, Adam | December 04, 1851 | 3rd cousin 3 times removed |
| Krysiak, Adam | October 16, 1859 | 3rd cousin 3 times removed |
| Krysiak, Agata | February 03, 1856 | 3rd cousin 3 times removed |
| Krysiak, Agnieszka | April 15, 1866 | 3rd cousin 3 times removed |
| Krysiak, Anastazya | | 1st cousin 5 times removed |
| Krysiak, Andrzej | November 23, 1881 | 4th cousin twice removed |
| Krysiak, Andrzej | September 26, 1885 | 4th cousin twice removed |
| Krysiak, Annie | January 31, 1916 | 5th cousin once removed |
| Krysiak, Antoni | | 2nd cousin 4 times removed |
| Krysiak, Antoni | 1815 | 2nd cousin 4 times removed |