was also known as Teunis Cuyper. Theunis Kuyper was born before 8 April 1685 at Wallabout, Kings County, New York. He was baptized on 8 April 1685 at Dutch Reformed Church, New York City, New York County, New York. He was the son of Cornelius Claesen Cuyper
and Aeltje Teunise Bogaert
. Theunis Kuyper a private in the Orange County Militia circa 1715. He an Ensign in the Orange County Militia in 1717. He and Marretje Blauvelt
resided at at Sickletown, Rockland County, New York, after 1718. Theunis Kuyper married Marretje Blauvelt
, daughter of Abraham Gerritsen Blauvelt
and Grietje Minnelay
, on 26 April 1718 at Dutch Reformed Church, Tappan, Rockland County, New York. Theunis Kuyper left a will on 2 October 1757. He died on 23 February 1758 at age 72. His estate was proved on 23 September 1767.