????
           Oncken, John Folkert (b:1837)(d:1925)
          |          ????
 Oncken, Mary (b:1874)(d:)
          |                    ????
          |          Ricklefs, Ricklef Mathies (b:1814)(d:1882)
          |         |          ????
           Ricklefs, Hilda Johanna (b:1849)(d:1921)
                    |          ????
                     Johnson, Elizabeth (Lizzie) (b:1812)(d:)
                               ????