Willem Peterse Van Slyck was also known as William Piertersie Van Slyck. He was also known as William Van Slijeck. Willem Peterse Van Slyck was born in 1635 at Bevenwyck, Netherlands. He was the son of
Pieterse (Teunis) Van Slyck. Willem Peterse Van Slyck married
Thisje Gerrits circa 1655 at New York. Willem Peterse Van Slyck married
Baartie (Unknown) circa 1658 at Kinderhook, Columbia County, New York. Willem Peterse Van Slyck immigrated in April 1660 to New Amsterdam, New York County, New York; on board the ship "De Trouw" (The Faith). He resided at at Brunswick, Rensselaer County, New York, in 1666.