'Arymbas' (or ''Arybas'', ''Arybbas'') was the king of
Epirus, succeeding his brother Neoptolemos in the year
360 BC. Both Arymbas and Neoptolemos claimed to be descendants of another
Neoptolemos, the son of
Achilles. Arymbas was the son of
Alcetas II of Epirus, the father of
Aeacides of Epirus by
Troas, and the grandfather of
Pyrrhus of Epirus.
Arymbas made a treaty of alliance with
Philip of Macedon, which was cemented by a marriage between Philip and Neoptolemos' daughter,
Olympias. Olympias later became known as the mother of
Alexander the Great.