Earl Scots or , Cornish . An earl has the title "Earl of [X]" when the title originates from a placename, or "Earl [X]" when the title comes from a surname. In either case, he is referred to as "Lord [X]", and his wife as "Lady [X]". A countess who holds an earldom in her own right also uses "Lady [X]", but her husband does not have a title (unless he has one in his own right). The eldest son of an earl, though not himself a peer, is entitled to use a courtesy title, usually the highest of his father's
Earl of Catherlough Earl of Catherlough Earl of Catherlough was a title in the Peerage of Ireland. It was created in 1763 for Robert Knight, 1st Baron Luxborough (1702–1772), Member of Parliament for Great Grimsby, Castle Rising and Milborne Port. The 1st Earl was the only son of Robert Knight, Cashier of the South Sea Company, by his first wife. He was with his father on his flight to Brabant in February 1721. In 1727, following his return to England, he married Henrietta St John, daughter of Henry St John, 1st Viscount St John, by his 2nd wife Angelica Pelissary. Henrietta was thus