Thomas de Beauchamp, 12th Earl of Warwick

Thomas de Beauchamp, 12th Earl of Warwick (1338–1401), was an English nobleman and chief opponent of Richard II. He campaigned in France with John of Gaunt and became a Knight of the Garter, and in the parliaments of 1376 and 1377 was appointed to supervise government reform.

In 1387 he was one of the Lords Appellant moving against the king's favourites. Lured to London in 1397, he was attainted and held in the Tower and on the Isle of Man. Freed when Henry Bolingbroke seized the throne in 1399, he was restored to his earldom and died in 1401.