Yakup I of Germiyan

Yakub I was the founder of the beylik of Germiyan, located in western Anatolia around Kütahya. Although Germiyan revolted against Mesud II, the Sultan of Rum, Yakub accepted vassalage under Kayqubad III. The Sultanate of Rum disintegrated shortly after. At that point, Yakub's realm extended as far east as Ankara and incorporated various towns taken from the Byzantine Empire and the Catalan Company. Yakub was the suzerain of many of his neighbors, and his reign was described as economically prosperous by contemporary historians. He was succeeded by his son Mehmed, nicknamed Chakhshadan.