Sir John Lethbridge, 1st Baronet (1746-1815), of Whitehall Place, Westminster; Sandhill Park, Somerset; Westaway in the parish of Pilton, Devon, and Winkleigh Court, Winkleigh, Devon, was Member of Parliament for Minehead in Somerset from 1806-7. He served as Sheriff of Somerset in 1788-9. In 2010 he was discovered to have been the natural father of Claire Clairmont, and thus the grandfather of Lord Byron's daughter Allegra.