Helias de Say (died 1165), also called "Hellias", was a Norman nobleman who lived in Clun near Shrewsbury, along the medieval Welsh Marches. He is believed to have inherited Clun Castle from his father, Henry de Say, in the reign of Henry I.Eyton 1860, p.228. Helias held the key fortification of Clun Castle during the years of the Anarchy. He was an important early benefactor of Haughmond Abbey. Upon his death, his only surviving child and heiress was Isabella de Say.
