(1) He is married to Maatje Olivier.
They got married
(2) He is married to Aeltje Pieters van Strijen.
Permission for the marriage has been obtained in ‘s-Gravenpolder on August 23, 1760.Source 1
961. Otr. 23 augustus te ‘s Gravenpolder, attestatie gegeven 7 september, Guilleaum van ‘t Vieren, wr. van Maatje Olivier, wonende te ‘s Gravenpolder, met Aeltje Pieters van Strijen, wed. van Marinus van de Mersen.
Kruiningen index ref. trouwen 1671-1810 https://geneaknowhow.net/script/zee/Trouwen%20Kruiningen%201671-1810.pdf