Grenville, William Wyndham Grenville, Baron, 1759–1834, British statesman; youngest son of George Grenville. He was foreign secretary in the ministry of his cousin William Pitt from 1791 to 1801. During the French Revolutionary Wars, Grenville led the British war party and favored Pitt's repressive internal measures. He was also a champion of free trade and of Catholic Emancipation. In 1806 he formed the "ministry of all the talents," which abolished (1807) the slave trade.
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