The curious case of the iniquitous in-laws: Oirat disloyalty in Mongol Iran

Abstract The Oirats were key supporters of the Mongol enterprise and helped to bring Chinggis Khan to power. Chinggis and his family intermarried with the royal lineage of the Oirats who were descended from Qutuqa Beki. As these marriages continued throughout Mongol history, descendants of Qutuqa Beki and Chinggis's daughter Checheyigen became key supporters of various successor khanates. In the Ilkhanate of Iran, one of their relatives, Tanggiz Küregen, and his family were intimately connected with the ruling house. The importance of Oirat military support for the Ilkhanid government was to such an extent that he and his descendants were regularly pardoned for treasonous acts. While other elite lineages such as the Juvainīs, the family of Arghun Aqa, and the Chupanids all had had great power and influence, they met violent ends at the hands of their Ilkhanid rulers. Tanggiz and his descendants however, were not only not overly punished for their acts of lèse-majesté , but in fact outlived the Ilkhanid Dynasty itself. This culminated in the government of ʿAlī Pādshāh, who ruled much of the former Ilkhanid realm through a puppet khan for a short period in 1336. This article investigates how Oirat power was both central to the Ilkhanid regime and helped cause its downfall.