????
                     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)
                     ????