William Hay was born at Glyndebourne, Sussex, on 21 August 1695. He died there, of apoplexy, on 22 June 1755. His father, William Hay, MP, and his mother, Barbara (née Stapeley), both died before he was ten years old. He attended school in Newish, near Lewes, and matriculated at Christ Church, Oxford in 1711 or 1712. He became a student at Lincoln's Inn in 1714, was called to the Bar in 1723 and became a country magistrate. In 1731 he married Elizabeth Pelham; they had three sons and two daughters. He was elected Whig Member of Parliament for Seaford at a by-election in January 1734, and held his seat until his death. His house at Glyndebourne eventually passed to William Langham Christie, ancestor of the George Christie who founded the opera festival there.
From The Continuum Encyclopedia of British Philosophy in Oxford Reference.