(1) He is married to Maria van der Neck.
Permission for the marriage has been obtained in Hontenisse on March 6, 1683.Source 1
datum: 6 maa 1683; naam bruidegom: Francijs van Sillaert; naam bruid: Maria van der Neck; weduwe van: Anthonij van der Heijden; scan: 14; link naar scan: https://www.familysearch.org/ark:/61903/3:1:3QS7-L9QJ-3462?i=129&cc=2036997
(2) He is married to Lucas Cortvrient.
Permission for the marriage has been obtained in Hontenisse on May 8, 1692.Source 1
datum: 8 mei 1692; naam bruidegom: Lucas Cortvrient; weduwnaar van: Maria van der Neck; naam bruid: Francoijs Sillaart; scan: 31; link naar scan: https://www.familysearch.org/ark:/61903/3:1:3QS7-99QJ-34GH?i=30&cc=2036997