Demetrios Doukas of Crete (;) was a professor of Greek in Spain and teacher of many Spanish humanists. Originally a member of the Greek community in Venice (dating from the Fall of Constantinople, 1453), Ducas moved to Spain and took part in the editing of the Complutensian Polyglot Bible. He was succeeded as chair of Greek by Hernán Núñez de Toledo y Guzmán in 1519.[1]