+———Frederick Rohrer (1 Apr 1792 – 16 Jul 1855 Rohrersville, Washington Co, MD)      |  +———Martin T. Rohrer (9 Jun 1827 Rohrersville, Washington Co, MD – 11 Jan 1911 Mt. Morris, Ogle Co, IL)  |   |          |   |   +———Conrad Thomas  |   |   |  |   +———Elizabeth Thomas (10 Jan 1801 – 1852 Rohrersville, Washington Co, MD)  |       |      |       +———Elizabeth Conn  |      Laura E. Lottie Rohrer (Jan 1854 – 1929)  |          |   +———William Eavey Avey  |   |  +———Margaret A. Avey (21 Feb 1829 – )      |          +———Nancy Unknown