????
                               Bartz, John (b:)(d:)
                              |          ????
                     Bartz, Herman (b:1865)(d:1923)
                    |         |          ????
                    |          Tomaszewska, Paulina (b:)(d:)
                    |                    ????
           Bartz, Albert Joseph (b:1888)(d:1960)
          |         |                    ????
          |         |          Szena, Nepomucer (b:)(d:)
          |         |         |          ????
          |          Szena, Pauline (b:1869)(d:)
          |                   |          ????
          |                    Engelmann, Michalina (b:)(d:)
          |                              ????
 Bartz, Gerald Edward (b:1926)(d:1973)
          |          ????
           Sobek, Frances (b:1887-1888)(d:)
                     ????