- Father: Attalus, a Macedonian
- Mother: Boa, a Paphlagonian
- c.340: Birth of Philetaerus
- As a eunuch, was commander of Pergamon, and responsible for a treasury of 9,000 talents.
- After 302 and the battle of Ipsus (301), he was loyal to Lysimachus.
- In the court intrigue that plagued Lysimachus in 283 (text), Philetaerus sided with Lysandra, wife of Lysimachus' executed son Agathocles; they fled to Seleucus in Babylon.
- Late 282: Seleucus invades Lysimachus' Asian possessions.
- February 281: Seleucus defeats Lysimachus at Corupedium; Philetaerus restored.
- Summer 281: Seleucus assassinated by Ptolemy Keraunos; Philetaerus pays for the dead body and sends the remains to Seleucia, where Seleucus' son Antiochus inters them.
- Philetaerus remains loyal to the House of Seleucus and is lord of Pergamon and the valley of the Caicus. He also gains influence in the Greek world.
- He adopts his nephews Attalus and Eumenes.
- 263: Death. He received divine honors as Euergetes ("benefactor")
Succeeded by: Eumenes I