He was the son of another
MP,
Thomas Williams of Llanidan (died 29 November 1802), sometimes known as the "Copper King", alongside whom he served from 1796 to 1802. His son
Thomas Peers Williams was another MP for Great Marlow, and so was his grandson Lt-General
Owen Lewis Cope Peers Williams (died 1904). Williams was married to Margaret Hughes, possibly daughter of his father's partner Rev. Edward Hughes, of Llysdulas (or his brother Michael Hughes), and had issue, at least one son, Thomas. His English residence was Temple House at
Bisham in Berkshire, very close to Marlow. == References ==