http://freepages.genealogy.rootsweb.ancestry.com/~wynkoop/webdocs/clinton.htm

 

At age 21, John Rosencrans acquired 500 acres of good farmland from his father. 

 

 

Six years later in 1751, he married Margaret De Witt who had been born in Rochester in 1731. 

Her father was Tjereck De Witt, son of Tjereck Classon De Witt of the Netherlands.  His wife was a relative of the New York Clinton family.  She was a niece of James Clinton who would be a general in the Revolutionary War and a cousin of his son, De Witt Clinton who would be an early governor of New York  

 

Husband, John Rosencrans also was related to the Clinton family, but in a more distant way, through his DuPuy grandfather.

 

Source: http://www.thehermitage.org/rosencrantz_extra.html

 

Tjerck Classen DeWitt, from the Netherlands, who, April 24, 1756, married, in New Amsterdam, Barbary Andriessen, from Amsterdam, Holland. Margaret DeWitt was related to Governor DeWitt Clinton. Her grandfather had a brother Andries, whose son, Egbert, married Mary Knottingham. Egbert’s son, Jacob Rutzen DeWitt married Jenneke (Jane) DePue, daughter of Moses DuPuy and Margaret Schoonmaker, his second wife. Jacob Rutzen DeWitt was a Captain during the Revolution and settled on the Neversink at the place afterward named Fort DeWitt, on account of a fort being built there during the Revolution. His sister Mary married General James Clinton, and her son DeWitt Clinton, afterward Governor of New York, was born March 2, 1769, in the stone residence of Captain DeWitt, at Fort DeWitt, now called Port Clinton — "Church Life." Thus Colonel John Rosenkrans was connected with Governor DeWitt Clinton through his grandfather DuPuy and also through his wife, Margaret DeWitt.

 

http://www.rosenkrantz-genealogy.org/Book/S09_G3.html#R016