He is married to Geesjen Cremer.
Permission for the marriage has been obtained in Deventer on February 26, 1698.Source 2
They were married in church on March 17, 1698 at Deventer (attestatie).Source 226-2-1698 huw. Willem Jansen van Roon j.m. van Groningen met Geesjen Cremers j.d. van wijlen Daniel Cremer in de Kleine Overstraat. De bruidegom was niet tegenwoordig. Att. geg. den 17 maart.