+———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 – )  |      John W. Longman (17 Nov 1842 Washington Co, MD – 29 Dec 1915 Mt. Morris, Ogle Co, IL)  |      +———Margaret Kretzer (8 Dec 1808 MD – 1 Mar 1881 Keedysville, Washington Co, MD)