His son Dr. Henry Grattan Guinness (1861–1915) founded the Congo-Balolo Mission in 1888 and co-founded the Congo Reform Association in 1904.
Association football | association football | Forward (association football) | Democratic Republic of the Congo | Goalkeeper (association football) | Defender (association football) | National Basketball Association | American Association for the Advancement of Science | Association of Tennis Professionals | American Library Association | World Boxing Association | National Collegiate Athletic Association | American Association | American Heart Association | Congo | National Association of Intercollegiate Athletics | National Rifle Association | International Development Association | National Association for the Advancement of Colored People | American Bar Association | Philippine Basketball Association | American Medical Association | Belgian Congo | International Air Transport Association | World Hockey Association | Women's Tennis Association | Republic of the Congo | Gaelic Athletic Association | Substitute (association football) | Progressive Conservative Association of Alberta |