 Through his mother, he is related to Donald Fairgrieve, former president of Gala RFC in the Scottish Borders, and also to former Scottish scrum-half Arthur Dorward (a cousin of his maternal grandfather), who played 15 Tests between 1950 and 1957.His younger brother, Jay, is also a rugby footballer, who played at lock for Auckland and has several caps for the esteemed Kew Occasionals, London's most social club!Together with former Blues and All Blacks teammate Doug Howlett, Williams is an official patron of the KidsCan Charitable Trust, a national charity dedicated to the welfare of financially disadvantaged New Zealand children.