(1) He is married to Wilhelmina den Haan.
They got married on December 12, 1880 at Alkmaar , he was 39 years old.Source 2
The couple were divorced from November 25, 1892 at Rotterdam .Source 3
(2) He is married to Ariaantje Knaap.
They got married on December 15, 1897 at Amsterdam , he was 56 years old.Source 4
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Vader Jacob van der Werf [~ca1807]
Moeder Gerridina Gerrits [~ca1807]