He is married to Maria Henderika van Beusekom.
They got married on September 17, 1925 at Amsterdam, Noord-Holland, Nederland, he was 27 years old.Sources 2, 5, 10, 11, 12, 13
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Gilles Albertus Koster | ||||||||||||||||||
1925 | ||||||||||||||||||
Maria Henderika van Beusekom | ||||||||||||||||||
Gilles Albertus Koster, "Nederland, Archival Indexes, Miscellaneous Records"/ FamilySearch
Record for Gilles Albertus Koster/ Ancestry.com
Gilles Albertus Koster/ FamilySearch
Maria Henderika van Beusekom/ FamilySearch