The following data is extracted from Genealogy and Biography of Ontario County, New York.
William (2), son of William (1) Clayton, was born about 1660, died in Chichester, Pennsylvania, about 1727. He married Elizabeth Bezer, a widow. Children: William, died 1757, married Mary, daughter of Walter Marten, of Chichester, and had Mary, William, Lydia. Sarah, Moses, Prudence, Patience and David: Richard; Rachel, married Thomas Howell: Ambrose; Thomas; Abel; Elizabeth, born July 12, 1685 (not mentioned in her father's will), married Daniel Davis; Edward, mentioned elsewhere.
Source: Genealogy and Biography of Ontario County, New York