Thanks for your response on my message (I write you in english, although I think you are dutch like me, but anyway there are also a lot of Americans with the same last name)I´m sorry for responding so late, but anyway better late than never.
SO I suppose it is clear that we come from the "zaanstreek", but I do not know much more really. That what you said about the windmill, they told me more or less the same, that is, I did not know Kaar is a word for Windmill, I always thought it was just a name of a certain windmill in the zaanstreek.
Anyway, maybe it could be interesting to interchange the names of the persons in our families to see if we are family or not.
Well, we´ll be in touch