[2] According to the Hungarian historian György Györffy, Michael received a ducatus or duchy from his brother, Grand Prince Géza.

Anonymus, the unknown author of the late-12th-century Gesta Hungarorum narrates that Michael's father, Taksony, took his wife "from the land of the Cumans".

[5] Other historians, including Zoltán Kordé[4] and Gyula Kristó,[6] say that Anonymous's report may refer either to her Khazar or to her Volga Bulgarian origin.

[8] He received baptism together with his elder brother, Géza, who succeeded their father as Grand Prince around that time.

[11] Therefore, Györffy continues, Géza "probably gave one of the ducatus" in the Principality of Hungary to Michael, although there is no record of these events.

[1][17] According to Györffy, "it is probable" that Michael's wife was related to Samuel of Bulgaria, because the names of his both sons were popular among Orthodox rulers, including the members of the Cometopuli family.