 His name is the heraldic term for "a bend (i.e.diagonal stripe) that is golden or yellow in color (or)", and is a reference to the ancient former arms of the Grosvenor family which were adjudged against them in 1389 to the Scrope family in the most famous case ever heard before the Court of Chivalry, known as "Scrope v Grosvenor".The Duke also awarded it as a lifelong family nickname to his grandson Hugh Grosvenor, 2nd Duke of Westminster (1879–1953), born in the year before the Derby win.