Isaac Newton Wyckoff Sr. was born on 31. Mar. 1822 at Millstone, Somerset County, New Jersey. He was the son of
John Van Middlesworth Wyckoff and
Maria Voorhees. Isaac Newton Wyckoff Sr. was baptized on 7. Jul. 1822 at Dutch Reformed Church, Millstone, Somerset County, New Jersey. He married
Margaret Smith on 4. Oct. 1849; no issue. Isaac Newton Wyckoff Sr. married
Abigail Voorhees Gulick, daughter of
Cornelius Jacob Gulick and
Sarah Ann Voorhees, on 15. Nov. 1870. Isaac Newton Wyckoff Sr. was shown in the census on 4. Jun. 1880 as a farmer.
Isaac Newton Wyckoff Sr. and
Abigail Voorhees Gulick appeared on the census of 4. Jun. 1880 at East Amwell Twp., Hunterdon County, New Jersey. Isaac Newton Wyckoff Sr. resided at at Cloverhill, Hunterdon County, New Jersey.
Isaac Newton Wyckoff Sr. appeared on the census of 7. Jun. 1900; a farmer.
Isaac Newton Wyckoff Sr. and
Abigail Voorhees Gulick appeared on the census of 7. Jun. 1900 at Bridgewater Twp., Somerset County, New Jersey; 3 children, 3 living. Isaac Newton Wyckoff Sr. died on 1. May. 1904 at Reaville, Hunterdon County, New Jersey, at age 82.