Is it possible that your Van Parys could also be spelled Van Paris?
The following is from the phone book:
C.J. Van Parys 3208 Hidden Rd Bay City, MI 48706
Floyd Van Parys 1110 Elm St. Bay City, MI 48708
There are several listings also for Van Paris.
I have a little information about some families with either spelling. What time frame are you interested in?