Sampson Eardley, 1st Baron Eardley FRS (10 October 1744 – 25 December 1824), known as Sir Sampson Gideon from 1759 until 1789, was the son of Sampson Gideon (1699–1762), a Jewish banker in the City of London who advised the British government in the 1740s and 1750s, and his wife Jane (died 1778), daughter of Charles Ermell of London.