Thestius was a figure in Greek mythology, known as the king of Aetolia. He was the son of Ares, the god of war, and Eurynome. Thestius is often associated with his numerous children, including the famous Calydonian Hunt participants, such as Meleager and Deianira. Thestius played a role in various myths, particularly in relation to the Argonauts and the Calydonian Boar. His legacy is marked by his connection to heroic tales and the adventures of his offspring, highlighting the intertwining of family and myth in ancient Greek storytelling.