Thestios is a character from Greek mythology, known as a king of Thessaly. He is often associated with the tales of the Argonauts and the adventures of Heracles. Thestios is recognized for his role as a father to several notable figures, including Althaea and Meleager. In mythology, Thestios is sometimes depicted as a wise and powerful ruler. His lineage is significant, as his children play important roles in various myths, particularly in the stories surrounding the Calydonian Boar Hunt. Thestios's legacy is intertwined with themes of heroism and familial bonds in ancient Greek narratives.