R. Rocholl, Geschichte des Geschlechts Rocholl aus Radevormwald, Berlin 1938, S. 164
__ | __|__ | Johann Friedrich KOEGEL | __ | (1800-1858)x1830 | | | |__|__ | Otto Louis KOEGEL | __ | (1845-1908)x1881 | | | | __|__ | | | | | Amalia GERLACH | __ | (1804-1885)x1830 | | | |__|__ |--Johannes KÖGEL | (1883-1914)x1912 __ | | | __|__ | | | __________________________| __ | | | | | | |__|__ | | | Elisabeth KUHNERT | __ (1861-1927)x1881 | | | __|__ | | |__________________________| __ | | |__|__