SS Byron was a transatlantic ocean liner that was built in England in 1914 and scrapped in Italy in 1937. She was launched as Vasilefs Constantinos, named after Constantine I of Greece. In 1919 she was renamed Megali Hellas, the Greek name for the Ancient Greek settlements in Sicily and southern Italy. In 1923 she was renamed Byron, in recognition of the role of Lord Byron (1788–1824) in the Greek War of Independence (1821–29). The ship was small compared with the great transatlantic liners of her era. But even in the 1930s she was the largest ship in the Greek merchant fleet.