Zilvester van Voorthuizen, born circa 1865 (?), died before March 27, 1918, aged at most 53 years.

Zilvester was married to
Aleyda Wevers, born circa 1869 (?), died before March 27, 1918, aged at most 49 years.

• 1 : Anna van Voorthuizen, born in Baarn circa 1892.
  Anna was married in Amersfoort on March 27, 1918, at the age of approximately 26 to Keimpe Johannes van Kamp (aged approximately 28 years), born in Amerongen circa 1890, son of Evert van Kamp (coppersmith) and Aukje Keimpes Feenstra (maid servant), fireman.