He is married to Amelken de Lange.
Permission for the marriage has been obtained in Hontenisse on August 25, 1703.Source 1
datum: 25 aug 1703; naam bruidegom: Olivier Schelvaert; naam bruid: Amelken de Lange; weduwe van: Anthonij Koesaert; scan: 49; link naar scan: https://www.familysearch.org/ark:/61903/3:1:3QS7-L9QJ-34ZD?i=48&cc=2036997