 Katrinus Sjoerds van der Werf, son of Sjoerd Douwes van der Werf and Akke Foppes Jorritsma.Born 28 Apr 1827 Tjerkwerd, died 7 Aug 1874 Wolsum, age 47 years, buried 12 Aug 1874 Blauwhuis. Occupation: landbouwer Married 12 May 1866 Wonseradeel, age 39 years (married 8 years) to:  Baukje Baukes Siemensma, age by marriage 28 years, daughter of Bauke Johannes Siemonsma and Marijke Reinders "Marijke" Jilderts.Born 25 Feb 1838 Oudega, died 23 Jun 1907 Wolsum, age 69 years, buried Blauwhuis Children: 1. Marijke van der WerfBorn 21 May 1867 Wolsum, died 10 Feb 1960 Witmarsum, age 92 years, buried Witmarsum 2. Douwe Catrinus van der WerfBorn 26 Mar 1873 Wolsum, died 13 Apr 1942 Bozum, age 69 years, buried Blauwhuis | |||