Pausanias Description of Greece 1.8.1

[1]
  It is pertinent to add here an account of Attalus, because he too is one of the Athenian eponymoi. A Macedonian of the name of Docimus, a general of Antigonus, who afterwards surrendered both himself and his property to Lysimachus, had a Paphlagonian eunuch called Philetaerus. All that Philetaerus did to further the revolt from Lysimachus, and how he won over Seleucus, will form an episode in my account of Lysimachus. Attalus, however, son of Attalus and nephew of Philetaerus, received the kingdom from his cousin Eumenes, who handed it over. The greatest of his achievements was his forcing the Gauls to retire from the sea into the country which they still hold.

[1] It is pertinent to add here a report about Attalos, because he too is one of the Athenian eponymous-heroes [ epōnumoi]. A Macedonian by the name of Dokimos, a general of Antigonos, who afterwards surrendered both himself and his property to Lysimakhos, had a Paphlagonian eunuch called Philetairos. All that Philetairos did to further the revolt from Lysimakhos, and how he won over Seleukos, will form an episode in my account of Lysimakhos. Attalos, however, son of Attalos and nephew of Philetairos, received the kingdom from his cousin Eumenes, who handed it over. The greatest of his achievements was his forcing the Gauls to withdraw from the seacoast into the region that they still hold.