The Alexeiad names Mikhael and Ioannes as grandsons of "the Cæsar Ioannes" and "Georgios Palaiologos the husband of their sister". The typikon of Theotokos Kecharitomenes (dated to [1110]) provides for the commemoration 9 Jan of "[le]...frère de ma Majesté, le prôtostratôr Michel Doukas".
The list of obituaries of the monastery of Christ Philanthropos, founded by Empress Eirene Doukas, records the death 9 Jan of "Mixael monaxou kai adelfou tes ayias despoines [toy protosebastou protostratoros]".
Married Euphrosyne, daughter of ---. The synodikon of the monastery of Iviron records "protosébaste Michel et…[la] protosébastè Euphrosyne" who Kouroupou and Vannier suggest may have been Mikhael Doukas (who is named protosébastos in the list of obituaries quoted above) and his wife. 1
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