Antiochus was born in Orestis, Makedon, the son of unknown parents. The date is not known.
His wife was Laodice. They were married, but the date and place have not been found. Their only known child was Seleucus I Nicator (c0358BC-0281BC).
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Note 1
Antiochus served as a military general under Philip II, who gained distinction as one of Philip’s officers. Through Seleucus, Antiochus would have thirteen Seleucid kings bearing his name and various monarchs bearing his name from the Kingdom of Commagene.