to an end. Some modern historians consider Thomas Palaiologos to have been the Prince of Achaea from 1432 to 1460, though that is a modern historiographical designation for him. Thomas Palaiologos's inheritance did not go completely unchallenged. In 1453, John Asen Zaccaria, illegitimate son of Centurione, claimed his father's title and warred against Thomas and Thomas's brother Demetrios. John was defeated in 1454 and died in exile in 1469. Some impostor pretenders to Byzantine descent historically claimed the position. From the late 15th century to 1530, the Albanian exile Constantine Arianiti claimed the title "Duke of Achaea", among others. Later in the 16th century, the title might have been claimed by Giovanni Demetrio Angeli (1499–1571), part of the Angelo Flavio Comneno family, which claimed descent from the Byzantine Angelos dynasty. Titular princes of Achaea, 1642–1933 On 4 November 1642, Philip IV of Spain confirmed through a royal diploma the right of Antonio di Tocco to style himself as the titular Prince of Achaea. Though his ancestors had not used the title for more than two hundred years, Antonio held a legitimate claim to it, being descended from Thomas Palaiologos and Catherine Zaccaria in the female line. The last fully documented and certain male-line descendants of Thomas Palaiologos died off in the early 16th century and the Tocco family were descended from Thomas's eldest daughter, Helena Palaiologina. Tocco family (1642–1884) Capece Galeota family (1889–1933) Notes References Bibliography Web sources Lists of monarchs