+———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 – )  |      Lucretta Longman (15 May 1828 – 31 Dec 1898)  |      +———Mary Ann Keefauver (1802 – )