The following data is extracted from Genealogy and Biography of Ontario County, New York.
(II) Cornelius, son of Abram Wyckoff, was born September 11, 1823, and died in 1894. He resided in the town of Ovid, Seneca county, and was a farmer all his active life. He married, November 17, 1847, Mary Ann Swarthout, who was born in Ovid, Seneca county, December 17, 1826, daughter of Ralph and Catharine (Hurd) (Voorhees) Swarthout. Children: John, born at Lodi, New York, August 27, 1848; Ella, born at Ovid, August 18, 1856; Edson, born at Ovid, December 21, 1858; Abram Ralph, mentioned elsewhere; Bertie, September 29, 1865.
Source: Genealogy and Biography of Ontario County, New York