These Mirzas organized loosely knit dominions, which were all under the nominal authority of the Khan of Tyumen and Sibir.
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Throughout its history rule over the Khanate was often contested between members of the Shaybanid and Taibugid dynasties; both of these competing tribes were direct patrilineal descendants of Genghis Khan through his eldest son Jochi and his fifth son Shayban (Shiban).
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The Khanate of Sibir and the town of Tyumen were founded by Taibuga probably some time between 1405 and 1428.
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Islam was the professed religion of the Sibir Khanate; it was the religion of the ruling Khan of Tyumen and Sibir.
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Mirzas also led the warriors of the Khanate of Sibir into battle and owed nominal allegiance to the Khan of Tyumen and Sibir.
Crimean Khanate | Zunghar Khanate | Khanate of Khiva | Sibir | Shirvan Khanate | Chagatai Khanate | Shaki Khanate | Khanate of Kazan | Karabakh Khanate | Karabakh khanate | Yarkent Khanate | Sibir Novosibirsk | Qasim Khanate | Kazakh Khanate | Astrakhan Khanate |