In Greek mythology, Agrius was a name given to a number of different characters. One of them was the son of Porthaon, king of Calydon. His brother was Oeneus who took the throne after their father’s death, but later, two of the sons of Agrius, Melanippus and Thersites, overthrew their uncle and offered the throne to their father. Agrius’ reign did not hold for long; soon afterwards, Diomedes managed to overthrow him and reinstate Oeneus; according to some sources, Diomedes slew Agrius and his sons. These events may have occurred right before the Trojan War.
Agrius Is also called Agrios.