Edward Vaux, 4th Baron Vaux of Harrowden (1588–1661) was a prominent Catholic English aristocrat and military officer. He was imprisoned in the aftermath of the Gunpowder Plot of 1605, the year in which he was nearly engaged to marry Lady Elizabeth Howard, daughter of the 1st Earl of Suffolk. Instead she was married to William Knollys, 1st Earl of Banbury. Edward Vaux finally wed Elizabeth in 1632, within a few weeks of her first husband's death. Her two sons, born during her first marriage, were popularly believed to be Lord Vaux's offspring.