George Herbert Walker III was an American businessman, diplomat and philanthropist. Walker served as the United States Ambassador to Hungary from 2003 to 2006. He was a first cousin of President George H. W. Bush as well as and first cousin once removed of President George W. Bush and former Florida Governor Jeb Bush.

George Herbert "Bert" Walker Sr. was an American banker and businessman. He was the maternal grandfather of United States President George H. W. Bush and a great-grandfather of President George W. Bush, both of whom were named in his honor. He was also the amateur heavyweight-boxing champion of Missouri while studying law at Washington University.