Ancestry References Sources Nicolas Cheetham, Mediaeval Greece, Yale University Press, 1981. Brook, Lindsay L (1989): "The problematic ascent of Eirene Kantakouzene Brankovic", Studies in Genealogy and Family History in Tribute to Charles Evans, published in Salt Lake City 1989 14th-century Serbian royalty 14th-century Byzantine people 15th-century Byzantine people Medieval rulers of Thessaly 14th-century births 1422 deaths Eastern Orthodox royal saints 14th-century Eastern Orthodox Christians 15th-century Eastern Orthodox Christians Medieval Serbian people of Greek descent Serbian saints of the Eastern Orthodox Church Nemanjić dynasty 15th-century Christian monks Sons of emperors Self-proclaimed monarchy