(1) He is married to Hendrika Nieuwkerk.
They got married on December 5, 1894 at Amsterdam, Noord-Holland, Nederland Nederland, he was 25 years old.Source 2
(2) He is married to Lijsje Fokker.
They got married on May 7, 1924 at Ouder-Amstel, Noord-Holland, Nederland Nederland, he was 55 years old.Source 3
Johannes Christiaan de Groot | ||||||||||
(1) 1894 | ||||||||||
Hendrika Nieuwkerk | ||||||||||
(2) 1924 | ||||||||||
Lijsje Fokker |