Gergis (Ancient Greek: Γέργις), also known as Gergithus or Gergithos (Γέργιθος) or Gergithes (Γέργιθες), and later Kerge, was a town in ancient Troad, on the north of the Scamander River. It was inhabited, according to Herodotus, by descendants of the mythical Teucrians. Herodotus also records that it was passed by the Persian army of Xerxes I on the way to Abydos in 480 BCE. In the time of Xenophon Gergis is called a strong place; it had an acropolis and strong walls, and was one of the chief towns of the Dardanian princess Mania. King Attalus of Pergamus transplanted the inhabitants of Gergis to a place near the sources of the Caicus, whence we afterwards find a place called Gergetha or Gergithion, near Larissa Phrikonis, in the territory of Cyme. The old town of Gergis was believed by some to have been the birthplace of the Sibyl, whence coins found there have the image of the prophetess impressed upon them.