+———Unknown Buck  |      William Buck (Apr 1874 MD – )  |              |       +———Johann John Langmann (1749 Hesse-Darmstadt, Germany – 2 May 1838 Rohrersville, Washington Co, MD)  |       |  |   +———Jonathan Longman (8 Jan 1806 Washington Co, MD – 5 Jan 1890 Keedysville, Washington Co, MD)  |   |   |      |   |   +———Eve Unknown (1758 Washington Co, MD – )  |   |  +———Barbara A. Longman (Jun 1849 MD – )      |          +———Margaret Kretzer (8 Dec 1808 MD – 1 Mar 1881 Keedysville, Washington Co, MD)