+———Johann John Langmann (1749 Hesse-Darmstadt, Germany – 2 May 1838 Rohrersville, Washington Co, MD)          |      +———Joseph Longman (1795 Washington Co, MD – )      |   |          |   +———Eve Unknown (1758 Washington Co, MD – )      |  +———Jacob Longman (1834 – )  |   |      |   +———Mary Ann Keefauver (1802 – )  |      Sarah Longman (1855 – )  |      +———Mary A. Wastler (1838 – )