I am related to Koster from Haarlem, Netherlands. My Koster line is from Neumuenster, Schleswig - Holstein, Germany
I am a Van Voorhees descendant down to Leah Voorhees who married Hosea Dean in Hamilton Co., OH in 1818. In Leah's ancestry are Banta, Tallman, Monfoort, etc.
My Dutch surnames are BOON/BOONE,BAUWENS,VANDASSELOR(VANDOORSLER?),kOPPENHOGEN/KOPPENHAGEN/CAPPENOLLE/CAPPENOLE, RULIE/RULI/ROELLE/ROELLES,BOSMAN
I come from many Dutch ancestors beginning with Toers, my mother's maiden name, They arrived in New Amsterdam around 1660. Other surnames include: Ackermann, Post, Litchhult, Banta, Buys, Gannung, Polhemus, Van Vorst, Quackenbosch, Demarest, Straut, Straatmaker, Vanderlinde, Van Rosenvelt & others.
Here's a link to some of them: http://familytree.turse.org/