????
           Martinson, Samuel Herman (b:)(d:)
          |          ????
 Martinson, Ronald (b:)(d:)
          |                              ????
          |                    Groth, August (b:1850)(d:1917)
          |                   |          ????
          |          Groth, Herman B (b:1882)(d:1964)
          |         |         |          ????
          |         |          Rutzen, Emilie (b:1852)(d:1930)
          |         |                    ????
           Groth, Lucille Emily (b:1923)(d:1992)
                    |                    ????
                    |          Manthei, Fred (Fritz) (b:1851)(d:1910)
                    |         |          ????
                     Manthei, Renata Natula (b:1893)(d:1943)
                              |          ????
                               Schwekowsky, Johanna (b:1859-1860)(d:1929)
                                         ????