John Komnenos Molyvdos (Greek: Ιωάννης Κομνηνός Μόλυβδος), also known by his monastic name Hierotheos (Ἱερόθεος) (1657-1719), was an Ottoman Greek scholar and physician, who later in life became a monk and Eastern Orthodox metropolitan bishop of Side and Dristra. He was a descendant of the Byzantine imperial dynasty of the Komnenoi, specifically of the branch that ruled the Empire of Trebizond, and is often regarded as the last member of the family.