Lazar Branković was a Serbian despot, prince of Rascia from 1456 to 1458. He was the third son of Đurađ Branković and his wife, Eirene Kantakouzene. He was succeeded by his elder brother, despot Stefan III Branković.
Lazar Branković from a charter held in Esphigmenou Monastery, Mount Athos
Despot or despotes was a senior Byzantine court title that was bestowed on the sons or sons-in-law of reigning emperors, and initially denoted the heir-apparent of the Byzantine emperor.
Empress Eudokia Ingerina with her sons Leo VI (left) and Alexander (right), both called despotes (ΔECΠOTHC)
Emperor Manuel II Palaiologos with his family: empress Helena Dragaš (right), and three of their sons, the co-emperor John VIII and the despots Andronikos and Theodore
Lead seal of Constantine Palaiologos, showing him in imperial regalia, and mentioning his titles of despot and porphyrogennetos