He is married to Trijntje van der Hoop.
They got married on May 17, 1934 at Opsterland, Friesland, Nederland, he was 28 years old.Source 3
grandparents
parents
brothers/sisters
children
https://allefriezen.nl/zoeken/deeds/9b714be8-09ce-11e5-b29d-83eaa874db81?person=82bb3fdc-09ce-11e5-bd27-7baec86a0909
https://www.delpher.nl/nl/kranten/view?coll=ddd&query=%28siebe+maakal%29&cql%5B%5D=%28date+_gte_+%2201-01-1970%22%29&facets%5Btype%5D%5B%5D=familiebericht&redirect=true&sortfield=date&identifier=ddd:010565881:mpeg21:a0176&resultsidentifier=ddd:010565881:mpeg21:a0176&rowid=2
https://allefriezen.nl/zoeken/deeds/e14f5e1e-09d0-11e5-b73c-032a17c6b302?person=0b12d9e2-09d1-11e5-9fc1-53f273ca1267