kaisar
Events
Date of Birth: unknown.
Place of Birth: unknown.
Date of Death: 12 May, about 1088.
Place of Death: unknown.
The date is given by Cawley. Polemis gives about 1088.
Relationships
Father: Andronikos Doukas.
This relationship is given by Kazhdan, by Schreiner, and by Polemis, who states that the only evidence for it is that Ioannes's son Andronikos is stated in a speech of Psellos to have been named after his paternal grandfather.
Mother: unknown.
Brother: Byzantine emperor Konstantinos X.
This relationship is given by Polemis, by Stanković, by Kazhdan, and by the PBW, citing 10 sources.
Spouse: Eirene Pegonitissa.
This relationship is given by Polemis, by Kazhdan, and by the PBW, citing Psellos Eirene 163.
Children:
Andronikos married Maria of Bulgaria.
Konstantinos.
References
Cawley, Charles. “IOANNES Doukas” in Medieval Lands: A prosopography of medieval European noble and royal families.
Kazhdan, Alexander P. and Anthony Cutler, “Doukas” in the Oxford Dictionary of Byzantium (Oxford University Press, 1991).
M. Jeffreys et al., Prosopography of the Byzantine World (2011) “Ioannes Doukas, kaisar” http://db.pbw.kcl.ac.uk/pbw2011/entity/person/107265 [consulted 31 July 2014].
Polemis, Demetrios I. The Doukai: A Contribution to Byzantine Prosopography. (University of London: The Athlone Press, 1968).
Schreiner, P. Dynastie der Komnenen genealogical table in volume 9 of Lexikon des Mittelalters. Munich: LexMA-Verlag, 1980-1998.
Stanković, Vlada. “Doukid Dynasty (1059-1081)”, 2008, Encyclopaedia of the Hellenic World, Constantinople.