He is married to Neeltie Benschop.
They got married on September 5, 1759 at Gorinchem (ZH).
Bron FamilySearch
akte 16 aug 1759 Gorinchem (ZH), ondertrouw Gijsbert van der Mast x Neeltie Benschop (Bruidegom), gebeurtenis 5 sep 1759 Gorinchem (ZH)
url (#https://familysearch.org/ark:/61903/3:1:3QSQ-G9QJ-Z78P?i=581&wc=SMM2-VZQ%3A1292923701%2C345829602%2C346758101%3Fcc%3D2037907&cc=2037907#)
Bron Stamboom den Uijl (Oscar den Uijl)