1874
(1) He is married to Willlemina van Zoelen.
They got married on November 4, 1874 at Rotterdam , he was 23 years old.Source 3
The couple were divorced from June 10, 1887 at Rotterdam .Source 4
(2) He is married to Elizabeth Geertruida van Leeuwaarden.
They got married on August 20, 1890 at Rotterdam , he was 38 years old.Source 5
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Vader Cornelis Proost [~ca1818; +18-5-1868 Cardiff]
Moeder Martijntje van Gelderen