(1) He is married to Antje de Haan.
They got married on January 29, 1920 at Achtkarspelen (Fr), he was 20 years old.Source 4
The couple were divorced from November 18, 1926 at Leeuwarden (Fr).
(2) He is married to Sjoerdtje Ganzevoort.
They got married on February 4, 1928 at Kollumerland c.a., Friesland, Nederland, he was 28 years old.Source 5
Geboorteregister 1899, Wonseradeel
Overlijdensregister 1962, Leeuwarden
https://www.graftombe.nl/names/info/542696/fokkens
Huwelijksregister 1920, Achtkarspelen
Huwelijksregister 1928, Kollumerland c.a.