He is married to Antonijna Timmerman.
Permission for the marriage has been obtained in Kruiningen on May 22, 1782.Source 1
They got married on June 12, 1782 at Kruiningen.Source 11188. Otr. 22 mei, Tr. 12 juni Cruijningen, Geeraard Abrahams Lavooij, geboren en wonende te Yerseke, met Antonijna Timmerman, jd. geboren en wonende alhier.
Kruiningen index ref. trouwen 1671-1810 https://geneaknowhow.net/script/zee/Trouwen%20Kruiningen%201671-1810.pdf