????
                     Volkmann, William (b:)(d:)
                    |          ????
           Volkmann, August Otto (b:1860)(d:)
          |         |          ????
          |          Grasse, Mary (b:)(d:)
          |                    ????
 Volkmann, Gustave A (b:1896)(d:1964)
          |                    ????
          |          Goldbeck, Daniel (b:)(d:)
          |         |          ????
           Goldbeck, Bertha W C (b:1870)(d:1943)
                    |          ????
                     Gaulke, Wilhelmine (b:)(d:)
                               ????