(1) He is married to Jannetje Michielsdr Tramper.
Permission for the marriage has been obtained in Schore on May 23, 1722.Source 1
499. Otr. 23 mei Schore, attestatie gegeven 7 juni, Gillis Joosten van Gelder, jm. van Bepen in Vlaanderen, en Jannetje Michielsdr. Tramper, jd. van Schore.
(2) He is married to Jannetje Poelmans.
Permission for the marriage has been obtained in 's-Gravenpolder on March 5, 1746.Source 1
They got married on March 23, 1746 at Kruiningen.Source 1773. Otr. 5 maart 's Gravenpolder, Tr. 23 maart, Gillis [Joosten] van Gelder, wr. van Jannetje [Michielsdr.] Trampers, wonende te Kruiningen, en Jannetje Poelmans, wed. van Marinus de Waeij, wonende te ‘s Gravenpolder.
Kruiningen index ref. trouwen 1671-1810 https://geneaknowhow.net/script/zee/Trouwen%20Kruiningen%201671-1810.pdf