Joannes Willems - Opsteen name

Hello Anthony

Joannes Willems, his forename Joannes, Willems is a patronymic off his father. So his father was Willem.
The children took the familyname off Opsteen.
The meaning from the name Opsteen is not known.

I've seen a church document which spelled the surname op Steen. In Dutch, that means of or on stone, I think. I suppose there is no way to figure willem's fathers name without dates to go by. I'm going do do some more digging. Thanks for your reply!