Koustouganes (Medieval Greek: Κουστουγάνης) was a Turkmen chieftain who was the earliest known head of the Emirate of Chalybia.
Additionally, within the Janik sanjak, Kuştoğan village (part of present-day Ünye District) was documented within the Satilmish nahiye.
Emperor Alexios II of Trebizond (r. 1297–1330) "deadened his pride" by restoring the city's fortifications.
[1] Koustouganes attacked from the western direction, a region that houses almost no monuments from his era and where mountains come perpendicular to the coastline.
While his death date and burial site are unknown, a damaged kumbet (tomb) in the village of Kale, Mesudiye possibly belongs to him.