????
                               Callahan, John Fielding (b:1889)(d:1959)
                              |          ????
                     Callahan, LeRoy Frank (Roy) (b:1925)(d:2012)
                    |         |                    Dorau, Christian (b:1802-1836)(d:)
                    |         |          Dorau, Albert Frederick (b:1861)(d:1951)
                    |         |         |          (unknown), (unknown) (b:)(d:)
                    |          Dorau, Emma Bertha (b:1894)(d:1988)
                    |                   |          Heyer, August (b:1820-1821)(d:)
                    |                    Heuer, Paulina (b:1864)(d:1907)
                    |                              Tesker, Henryeta (b:1818-1819)(d:)
           Callahan, Michael Owen (b:1953)(alive: 2026)
          |         |          ????
          |          Fox, Lois Marie (b:1927)(d:2006)
          |                    ????
 Callahan, Patrick (b:1987)(d:)
          |          ????
           Foster, Claire E (b:1956)(alive: 2026)
                     ????