Gerben Roels Koolstra - Pedigree | FamilyCentral
 3 Jul 1873 -
 1844 - 24 Sep 1903
  - 23 Sep 1910
Family Group
Family Group
 13 Apr 1800 - 15 May 1863
  - 31 Oct 1810
 1758 - 15 Feb 1831
Family Group
Family Group
 Abt 1740 -
 Abt 1742 -
Tjitske Wiltjes Kroese
 md. 16 May 1896
  Children
1.
Sjoukje Gerbens Koolstra
    2.
Wilt Gerbens Koolstra
    3.
Living