Glaucias (Γλαυκίας; ruled c. 335 – c. 295 BC) was a ruler of the Taulantian kingdom which dominated southern Illyrian affairs in the second half of the 4th century BC. Glaucias is first mentioned as bringing a considerable force to the assistance of Bardylis' son Cleitus, an Illyrian prince who revolted against Alexander the Great, in the battle of Pelium 335 BC. They were, however, both defeated, and Cleitus was forced to take refuge within the Taulantian territories, whither Alexander did not pursue him, his attention being called elsewhere by the news of the revolt of Thebes.
We next hear of Glaucias, nearly 20 years later, as affording an asylum to the infant Pyrrhus, when his father Aeacides was driven out of Epirus; Glaucias' wife Beroea belonged to the Molossian Aeacidae. By this measure he gave offence to Cassander, who sought to gain possession of Epirus for himself, and who in vain offered Glaucias 200 talents to give up the child.
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