Gambrion is first mentioned in Xenophon’s Hellenika as being ruled by Gorgion, son of Gongylos. He provided some support, along with Prokles of Teuthrania, to Xenophon in escaping from a botched kidnapping attempt.
The city was named after a son of Hermes who threw himself into a river (later named for him) after sleeping with his sister. The city was very close to Pergamon.
399 BCE
Xenophon mentions that the ruler of Gambrion and Gryneion is Gorgion, son of Gorgylos.