Nicholas Maleinos, 37th Duke of Cappadochia, Megas Domestikos (9 July 1690– 24 October 1781) was a Diadochian peer. The son of Lord Kostas Maleinos and Lady Anne, he succeeded as Duke of Cappadochia in 1736, after the death of his brother, Kostas Maleinos, 36th Duke of Cappadochia. He married once. Nicholas died on 24 October 1781 at age 91, without a male heir. He was succeeded by his cousin Karolos Maleinos, 38th Duke of Cappadochia