Arybbas (373 BC - 343 BC, 330 BC -319 BC) was king of the Molossians

Molossians

The Molossians were an ancient Greek tribe that inhabited the region of Epirus since the Mycenaean era. On their northeast frontier they had the Chaonians and to their southern frontier the kingdom of the Thesprotians, to their north were the Illyrians. The Molossians were part of the League of...

. He was son of Alcetas and brother of Neoptolemus

Neoptolemus I of Epirus

Neoptolemus I of Epirus was a king of Epirus and son of Alcetas I, and father of Alexander I of Epirus and Queen Olympias. He was a maternal grandfather of Alexander the Great...

 and grandfather of Pyrrhus

Pyrrhus of Epirus

Pyrrhus or Pyrrhos was a Greek general and statesman of the Hellenistic era. He was king of the Greek tribe of Molossians, of the royal Aeacid house , and later he became king of Epirus and Macedon . He was one of the strongest opponents of early Rome...

. He married Troas

Troas

The Troad, also known as Troas, is the historical name of the Biga peninsula in the northwestern part of Anatolia, Turkey. This region now is part of the Çanakkale province of Turkey...

 (sister of Olympias

Olympias

Olympias was a Greek princess of Epirus, daughter of king Neoptolemus I of Epirus, the fourth wife of the king of Macedonia, Philip II, and mother of Alexander the Great...

). In ca. 360 BC, against an Illyrian attack, Arybbas evacuated his non-combatant population to Aetolia

Aetolia

Aetolia is a mountainous region of Greece on the north coast of the Gulf of Corinth, forming the eastern part of the modern prefecture of Aetolia-Acarnania.-Geography:...

 and let the Illyrians loot freely. The stratagem

Stratagem

Stratagem may refer to:* Confidence trick, an attempt to swindle a person which involves gaining his or her confidence* Ruse of war, an action taken to fool the enemy.* HMS Stratagem , an S class submarine...

 worked and the Molossians fell upon the Illyrians now encumbered with booty and defeated them. Arybbas ruled Epirus until 342/1 BC, when he was driven into exile by Philip II

Philip II of Macedon

Philip II of Macedon "friend" + ἵππος "horse" — transliterated ; 382 – 336 BC), was a king of Macedon from 359 BC until his assassination in 336 BC. He was the father of Alexander the Great and Philip III.-Biography:...

, who placed Alexander I

Alexander I of Epirus

Alexander I of Epirus , also known as Alexander Molossus , was a king of Epirus of the Aeacid dynasty. As the son of Neoptolemus I and brother of Olympias, he was an uncle of Alexander the Great...

 on the throne. Arybbas's son was Alcetas II

Alcetas II of Epirus

Alcetas I , king of Epirus, was the son of Tharypus. For a reason, of which we are not informed, he was expelled from his kingdom, and took refuge with Dionysius I of Syracuse, by whom he was reinstated. After his restoration we find him the ally of the Athenians, and of Jason of Pherae, the...

,who reigned as a king of Epirus from 313 BC to 303 BC. He may be the Aryptaeus, king of the Molossians mentioned by Diodorus 18.11.1, who joined the Hellenic cause in the Lamian War

Lamian War

The “Lamian War”, also referred to as the “Hellenic War” and the “War against Antipater”, was fought by the Athenians and their Aetolian, Locrian, and Phocian allies against the Macedonians in Thessaly during the winter of 323–322 BC...

.
He was also an Olympic and Pythian

Pythian Games

The Pythian Games were one of the four Panhellenic Games of Ancient Greece, a forerunner of the modern Olympic Games, held every four years at the sanctuary of Apollo at Delphi....

 victor in tethrippon (chariot race).