Association football | association football | Massachusetts | Forward (association football) | Massachusetts Institute of Technology | Goalkeeper (association football) | Defender (association football) | National Basketball Association | American Association for the Advancement of Science | Association of Tennis Professionals | Cambridge, Massachusetts | Massachusetts House of Representatives | American Library Association | World Boxing Association | National Collegiate Athletic Association | American Association | American Heart Association | Massachusetts General Hospital | Lowell, Massachusetts | Admission to the bar in the United States | National Association of Intercollegiate Athletics | Worcester, Massachusetts | University of Massachusetts Amherst | National Rifle Association | International Development Association | National Association for the Advancement of Colored People | American Bar Association | Philippine Basketball Association | American Medical Association | Andover, Massachusetts |
Williams was a member of the Congregational church, the freemasons, the American Law Institute, the Massachusetts Bar Association, Sigma Alpha Epsilon, the Harvard Club of Boston, the Union Club of Boston, the Brae Burn Country Club, and the Grange.