Marquess of Ely, of the County of Wexford, is a title in the Peerage of Ireland. It was created in 1800 for Charles Loftus, 1st Earl of Ely. He was born Charles Tottenham, the son of Sir John Tottenham, 1st Baronet, who had been created a baronet, of Tottenham Green in the County of Wexford, in the Baronetage of Ireland in 1780, by Elizabeth, daughter of Nicholas Loftus, 1st Viscount Loftus, sister and heiress of Henry Loftus, 1st Earl of Ely.