Isa of Aydin

During his reign, the town of Ayasuluk was relatively prosperous economy wise, and held good mercantile relations with the towns of Venice, Ragusa (modern-day Dubrovnik), and Genoa.

[1] Unlike the Beylik of Isfendiyar, the Aydinids did not support the forces of the Ottoman ruler Murat I in the 1389 Battle of Kosovo.

His reign eventually ended a year after the battle in 1390 when the new Ottoman ruler Bayezid I annexed the principality together with other Turkmen principalities that were located in western Anatolia.

Bayezid shortly after married Isa Bey's daughter Hafsa Khatun.

[1] Isa Bey held interests in scholarship and learning, and was able to read Arabic, Persian and Old Anatolian Turkish.