The Wansers and Dudleys

I am searching for information on the Wanser's and Dudley's in America and where the families came from. I believe the Wanser's came from Holland {Netherlands} and the Dudley's came from England. Any information would be gratefully appreciated. The Wanser name was originally spelled Wanshaer and I am descended from Jan Jansen{Janzen}. I will gladly share what information I have.