The following data is extracted from Genealogy and Biography of Ontario County, New York.
William Clayton, immigrant ancestor, was born in England. and came from London, England. in the ship "Kent," with certain commissioners sent out by the proprietors of New Jersey to purchase land from the Indians and perform other duties. In March, 1678-i9, he purchased the share of Hans Oelson. one of the grantees of Marcus Hook, New Jersey, and settled at that place. He was a Quaker in religion. but he took an active and prominent part in public affairs. He was a member of Governor Markham's council and also of the proprietors' council. He was justice of the upland county and subsequently in Chester count-, Pennsylvania. presiding at the first court held in Pennsylvania under the proprietary government. He died in 1689. leaving a widow Prudence. Children: Prudence, married Henry Reynolds, November 10, 1678: Honor; William, mentioned elsewhere; Mary, married John Beals in 1682.
Source: Genealogy and Biography of Ontario County, New York