John Doukas

Type Figure Region Byzantine Empire Time c. 1020–1088 Also known as John Doukas、Ἰωάννης Δούκας、John Ducas

John Doukas (c. 1020–1088) was a prominent member of the Byzantine Doukas family and maternal uncle of Alexios I, a key planner of the 1081 Komnenian…

Timeline

1081Constantinople · Byzantine EmpireIn 1081 John Doukas conspired with Anna Dalassene, mobilizing family resources and military force to support his nephew Alexios in overthrowing Nikephoros III; after the coup succeeded he became one of the most powerful regents of the new dynasty.
1081–1088Constantinople · Byzantine EmpireAfter the coup John Doukas was granted the title Caesar, assisting Alexios with court governance and diplomacy from 1081 to 1088, coordinating noble factions until his death in April 1088.

Sources

John Doukas (caesar) https://www.britannica.com/biography/John-Doukas
The Oxford Dictionary of Byzantium — Alexander Kazhdan (1991)