Antigonus II Gonatas

Antigonus
Coin of Antigonus Gonatas
King of Macedonia
Reign	277 - 274 BC (first time)
Predecessor	Sosthenes
Successor	Pyrrhus of Epirus
Reign	272 - 239 BC (second time)
Predecessor	Pyrrhus of Epirus
Successor	Demetrius Aetolicus
Born	circa. 319 BC
Died	239 BC
Spouse	Phila (daughter of Seleucus)
Issue	Demetrius Aetolicus
Dynasty	Antigonid dynasty
Father	Demetrius Poliorcetes
Mother	Phila (daughter of Antipater)

Antigonus II Gonatas (Greek: Ἀντίγονος B΄ Γονατᾶς) (c. 319–239 BC) was a powerful ruler who solidified the position of the Antigonid dynasty in Macedon after a long period defined by anarchy and chaos and acquired fame for his victory over the Gauls who had invaded the Balkans.

Antigonus Gonatas was born around 319 BC, probably in Gonnoi in Thessaly unless Gonatas is derived from an iron plate protecting the knee (Ancient Greek gonu, genitive gonatos). He was related to the most powerful of the Diadochi (the generals of Alexander who divided the empire after his death in 323 BC). Antigonus's father was Demetrius Poliorcetes, who was the son of Antigonus I Monophthalmus, who then controlled much of Asia. His mother was Phila, the daughter of Antipater. The latter controlled Macedonia and the rest of Greece and was recognized as regent of the empire, which in theory remained united. In this year, however, Antipater died, leading to further struggles for territory and dominance.

The careers of Antigonus's grandfather and father showed great swings in fortune. After coming closer than anyone to reuniting the empire of Alexander, Antigonus Monophthalmus was defeated and killed in the great battle of Ipsus in 301 BC and the territory he formerly controlled was divided among his enemies, Cassander, Ptolemy, Lysimachus, and Seleucus.

The fate of Antigonus Gonatas, now 18, was closely tied with that of his father Demetrius, who escaped from the battle with 9,000 troops. Jealousy among the victors eventually allowed Demetrius to regain part of the power his father had lost. He conquered Athens and in 294 BC he seized the throne of Macedonia from Alexander, the son of Cassander.