Demir Khan

Demir Khan, aka Demirhan, was Bey of Karasi from to 1332.

According to modern historian Elizabeth Zachariadou, Demir Khan inherited the throne from his father Karasi Bey. Demir Khan was the ruler of Balıkesir, while his brother Yakhshi Khan controlled the area around Pergamos, though Zachariadou pointed out Demir Khan was likely the senior emir. Demir Khan was also identified as Yakhshi Khan's son, specifically by the Byzantine historian and Emperor John VI Kantakouzenos , which is claimed to be false by several historians.

Demir Khan harassed the towns near Cyzicus and raided coastal parts of southern Balkans through his naval forces based in the Sea of Marmara. For this matter, Byzantine Emperor Andronikos III met with Demir Khan in Pegai in 1328, when they signed a treaty. In 1333, Demir Khan met with the Maghrebi traveller Ibn Battuta. Ibn Battuta deemed Demir Khan a "worthless" person like the population of Balıkesir, and mentioned that the former was disliked by his own people. According to historian al-Uryan, the ruler of Pergamos was "Senbogha", who was subordinate to Demir Khan. Some modern historians maintain that Demir Khan had a short reign.

Demir Khan is alternatively identified as Karasi's later ruler (Yakhshi's son). Claude Cahen proposes that Ajlan, the Karasid prince mentioned by Ottoman sources (died ) may have been Karasi Bey's nickname, and so his sons who were involved in a dynastic conflict may be Demir Khan and Yakhshi Khan (named Dursun). Dursun was subsequently killed, and the Ottomans thus annexed the territory.