Cornelis' primary occupation was as a farmer. He emigrated in 1641 with his family from Vianen, Utrecht, Holland to Rensselaerwyck with Andries De Vos on the Den Eyckenboom.
He was a resident of Fort Orange, Albany County, NY in 1642, New Amersfoort, Kings County, NY in 1659, lived in Schenectady, NY until 1677 when he finally settled in Rensselaerwyck.
Marriage 1 Maycke Van Der BURCHGRAEFF b: 1605 in Leskmond, South Holland
Children
Hendrickje VAN NESS b: 1625
Gerritje VAN NESS b: 1627 in Netherlands
Grietje VAN NESS b: 1630 in Laechervelt, Vianen, Netherlands
Hendrick VAN NESS b: 1638 in Vianen, South Holland
Gerrit VAN NESS b: 1645
Jan VAN NESS b: 1645
Marriage 2 Maritje DAMEN
Married: 21 MAR 1663/64
Cornelius Van Ness 
