Balius
Balius and Xanthus, the immortal horses of Achilles. They were sons of Zephyrus and the Harpy Podarge.
From Smith's Dictionary of Greek and Roman Biography and MythologyFrom From The Iliad of Homer. Book XVI
He bade Automedon yoke his horses with all speed, for he was the man whom he held in honour next after Achilles, and on whose support in battle he could rely most firmly. Automedon therefore yoked the fleet horses Xanthus and Balius, steeds that could fly like the wind: these were they whom the harpy Podarge bore to the west wind, as she was grazing in a meadow by the waters of the river Oceanus. In the side traces he set the noble horse Pedasus, whom Achilles had brought away with him when he sacked the city of Eetion, and who, mortal steed though he was, could take his place along with those that were immortal.
