Rukn al-Din Jahanshah bin Tughril (r. 1225–1230) was a Turkoman king of the "Seljuqs of Erzurum".
[2] He was a son of Tughril ibn Kılıç Arslan II, also ruler of Erzurum (r. 1202–1225).
Jahanshah was a grandson of Kilij Arslan II, who had partitioned his kingdom in Anatolia between his numerous sons.
[3] During the 30 years after this conquest, Erzurum was ruled by the two Seljuq princes Tughril ibn Kılıç Arslan II and Jahan Shah bin Tughril as an appanage.
[4] He also allied with the Khwarizmian Shah Jalal al-Din, until he was defeated at the Battle of Yassı Çimen in 1230.