He is married to Jacomijn van Rossem.
Permission for the marriage has been obtained in Ossenisse on January 27, 1652.Source 1
They got married on March 24, 1652 at Ossenisse.Source 1otr. 27 jan 1652; tr. 24 maa 1652; bdg. Willem de Mulder; br. Jacomijn van Rossem; opm. ghetuijgen Cornelis de Potter van Eeelaer in West-Vlaenderen, Maijcken Smits van Ossenisse
Ossenisse ondertrouw 1648-1682 https://www.geneaknowhow.net/script/zee/Ossenisse_ondertrouw_1648-1682.pdf