(1) He is married to Janneken Leenders.
They got married
(2) He is married to Sijntje Kerstens.
Permission for the marriage has been obtained in Ossenisse on around 1658.Source 1
They got married on July 19, 1658 at Hontenisse.Source 2otr. [1658?]; bdg. Cornelis Joostens; br. Sijtie Kerstens
datum: 19 jul 1658; naam bruidegom: Cornelis Joosens; weduwnaar van: Janneken Leenders; naam bruid: Sijntien Keesters; weduwe van: Pieter Deij; scan: 39; link naar scan: https://www.familysearch.org/ark:/61903/3:1:3QS7-99QG-2VBQ?i=38&cc=2036997
(3) He is married to Elizabeth van Kerckhooven.
Permission for the marriage has been obtained in Hontenisse on April 24, 1666.Source 1
They got married on April 29, 1666 at Ossenisse.Source 1datum: 24 apr 1666; naam bruidegom: Cornelis Joosens; weduwnaar van: Sijntie Kerstens; naam bruid: Elizabeth van Kerckhoven; scan: 52; link naar scan: https://www.familysearch.org/ark:/61903/3:1:3QS7-99QG-2VPD?i=51&cc=2036997
otr. 29 apr 1666; bdg. Cornelis Joossens wed[uwnaar] van Sijntje Kerstens woonende op Ossenessche; br. Elizabeth van Kerckhooven jd van Lamsweerden
Ossenisse ondertrouw 1648-1682 https://www.geneaknowhow.net/script/zee/Ossenisse_ondertrouw_1648-1682.pdf
Trouwen Hontenisse 1648-1793 (verschijnt binnenkort online)