(1) He is married to Wijbigje Stuurman.
They got married on July 10, 1919 at Idaarderadeel (Fr), he was 26 years old.Source 4
The couple were divorced from September 4, 1947 at Leeuwarden (Fr).
(2) He is married to Elisabeth Donker.
They got married on November 6, 1947 at Achtkarspelen (Fr), he was 54 years old.Source 5
Geboorteregister 1890-1893, Idaarderadeel
Overlijdensregister 1966, Achtkarspelen
https://www.graftombe.nl/names/info/237607/meulen_van_der
Huwelijksregister 1919, Idaarderadeel