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Charles Cavendish, Viscount Mansfield (c. 1626 – June 1659) was an English gentleman who sat in the House of Commons from 1640 to 1644. He supported the Royalist cause in the English Civil War. Viscount Mansfield was the eldest son and heir of William Cavendish, 1st Earl of Newcastle-upon-Tyne, who was so created in 1628, and his first wife, Elizabeth Basset of Blore. From 1628, as a son and heir he was known by his father's second peerage, Viscount Mansfield, used as a courtesy title. Wikipedia