Clarence, George, duke of definition of Clarence, George, duke of in the Free Online Encyclopedia.

Clarence, George, duke of, 1449–78, son of Richard, duke of York, and brother of Edward IV Edward IV, 1442–83, king of England (1461–70, 1471–83), son of Richard, duke of York . He succeeded to the leadership of the Yorkist party (see Roses, Wars of the ) after the death of his father in Wakefield in 1460.
..... Click the link for more information. . In defiance of Edward, Clarence married Isabel Neville and joined her father, Richard Neville, earl of Warwick Warwick, Richard Neville, earl of (nĕv`əl, wŏr`ĭk), 1428–71, English nobleman, called the Kingmaker.
..... Click the link for more information. , in rebellion against the king in 1469–70. He deserted that party in 1471, however, and was reconciled with Edward. In 1478, exasperated by Clarence's continued factiousness, Edward had him attainted for treason by Parliament. He was sent to the Tower of London, where he was secretly executed. It was rumored that he was drowned in a butt of malmsey wine.