Antigonus was the nephew of Antigonus II Gonatas. On death of Demetrius II of Macedon (229 BC) Antigonus made guardian on Demetrius II son Philip. In 227 BC Antigonus married widow of Demetrius II, Phthia, deposing the young Philip, and became king.
Antigonus III Doson: king of ancient Macedonia, ruled 229-221.
228 (?): Because the Seleucid Empire is weakened by a civil war between king Seleucus II Callinicus and Antiochus Hierax, Antigonus is able to intervene in Caria.
Revolt in the north; Antigonus returns and is killed in action.
ANTIGONUS II GONATAS (knock-kneed?) was driven from Macedon by Pyrrhus of Epirus (274).
Antigonus defeated Ptolemy in a naval battle off Cos and took the Cyclades, though he had to reconquer them later in the Battle of Andros (245).
Antigonus III Doson (going to give, i.e., always promising) succeeded his cousin Demetrius as guardian of the latter's eight-year-old son, Philip, whom he deposed in 227 to become king himself.