Gongylos

After the defeat of the Second Persian invasion of Greece in 479 BCE, Gongylos was forced to flee and take refuge in the Achaemenid Empire. Gongylos was one of the several Greek aristocrats who took refuge in the Achaemenid Empire following reversals at home, other famous ones being Hippias, Demaratos, and Themistocles. who was living at Pergamon. His two sons, Gorgion and Gongylos the younger, ruled respectively over the cities of Gambrium and Palaegambrium for Gorgion, and Myrina and Grynium for Gongylos. Xenophon received some support from the descendants of Gongylos for his campaign into Asia Minor, as well as from the descendants of Demaratos, a Spartan exile who also had become a satrap for the Achaemenids, in the person of his descendant Prokles.

It is thought that the Greek dynasts of Pergamon were punished following the Peace of Antalcidas in 386 BCE for their support of the Greeks against the Achaemenids. However, by the mid-4th century BCE, the Achaemenid satrap Orontes again allowed the people of Pergamon to settle on the acropolis of their city. This lasted until the conquests of Alexander the Great, when Pergamon became part of the Macedonian Empire.