(1) He is married to Catharina Hoelands.
Permission for the marriage has been obtained in Hontenisse on October 15, 1768.Source 1
datum: 15 okt 1768; naam bruidegom: Gerrit de Vries; naam bruid: Catharina Hoelands; weduwe van: Dijdlief Hendrik Hamar; scan: 211; link naar scan: https://www.familysearch.org/ark:/61903/3:1:3QS7-99QJ-3H48?i=210&cc=2036997
(2) He is married to Anna van Saalen.
Permission for the marriage has been obtained in Hontenisse on April 20, 1780.Source 1
datum: 20 apr 1780; naam bruidegom: Gerrit de Vries; weduwnaar van: Catharina Hoelands; naam bruid: Anna van Saalen; weduwe van: Jacobus Kiens; scan: nvt; link naar scan: https://www.geneaknowhow.net/script/dewit/hontenisse-ondertrouw-1776-1793.htm