Cornelisse van Ysselsteyn (Van Esselsteyn) 
Cornelisse was born about 1610 in Barnevelt, Holland. He died about 1699 in Claverack, Columbia County, New York.General Notes
Veltin Van Ysselsteyn was the progenitor of the family, who became lord and proprietor of Insel-Stein (Island Rock) around 500 AD. He was granted title by King Clovis.
From an exceptionally wealthy family of old German ancestry. He held the position of Judge and Proprietor of the Soil in the Netherlands..
