Foundation for Medieval Genealogy; http://fmg.ac/; Medieval Lands @ Byzantium, 1057-1204, Chapter 5
(Ref: Byzantium, 1057-1204, Chapter 5) The author/originator was Charles Cawley.
References (4)
Parent Source:
Foundation for Medieval Genealogy; http://fmg.ac/; Medieval Lands
Individual:
Margareta of Hungary
Individual:
Manuel Angelus
Individual:
Ioannes Angelus