Tâceddin Altunbaş

Tâceddin Altunbaş was a Seljuk prince, a son of Gıyaseddin Mesud II, the last Sultan of Rûm. After his father's death in 1308, the Mongol Ilkhan granted him Amasya and the lands around Samsun and Ladik, which he governed as a Mongol vassal.

In 1318, after his atabeg Emir Yeşbek was killed in Amasya during clashes with the Mongols, he withdrew north to Ladik and ruled independently, founding the Turkmen beylik of the Kubadids. He died around 1357 and was succeeded by his son Keykubad.