+———John Peter Light                      |                  +———Henry Light                  |              +———Henry Light              |          +———Martin Light (1788 PA – )          |      +———John O. Light (17 Jul 1812 Lebanon Co, PA – 1901)      |  +———Martin Light (23 May 1847 Lightsville, Leaf River, Ogle Co, IL – 8 Mar 1941 Lightsville, Leaf River, Ogle Co, IL)  |   |      |   +———Catherine Schucker  |      Cora Ann Light (28 Sep 1868 Ogle Co, IL – 20 May 1946 IL)  |              |       +———Henry Schroeder ( – 1888 Wayne Co, IN)  |       |  |   +———Henry Schrader (8 Sep 1817 Washington Co, MD – 1 Mar 1902 Leaf River, Ogle Co, IL)  |   |   |          |   |   |   +———Johann John Langmann (1749 Hesse-Darmstadt, Germany – 2 May 1838 Rohrersville, Washington Co, MD)  |   |   |   |  |   |   +———Catherine Longman (bef 1799 Hagerstown, Washington Co, MD – )  |   |       |      |   |       +———Eve Unknown (1758 Washington Co, MD – )  |   |  +———Harriet Sophia Shrader (20 Sep 1846 Leaf River, Ogle Co, IL – 20 Jun 1887)      |              |   +———David Iler      |   |      +———Mahalia Iler (2 Aug 1821 Sharpsburg, Washington Co, MD – 10 Aug 1901 Leaf River, Ogle Co, IL)          |              +———Mary Harmon