+---- Arnold W. Sewalt
==== Arno Sewalt
| +---- Pieter Schipper 1843-
| +---- Cornelis Schipper 1867-1931
| | +---- Hendrika Jansen 1842-
| +---- Hendricus Maria Johannes Schipper
| | | +---- Nicolaas Wegman
| | +---- Johanna Wilhelmina Wegman 1867-1948
| | +---- Maria Philippina Smout
+---- Clazina Elizabeth Schipper
| +---- Johannes Verhage 1832-1919
| +---- Martinus Verhage 1864-1955
| | +---- Johanna Verberg 1835-1919
+---- Clazina Johanna Verhage
| +---- Theodorus Juffermans 1833-1907
+---- Maria Juffermans 1871-1955
+---- Clazina Maria Bellekom 1842-
|