Acastus

Acastus (; : Ἄκαστος) is a character in . He sailed with and the , and participated in the hunt for the .
Family.
Acastus was the son of , then king of , and (Philomache in some traditions). Acastus with his wife (also called , daughter of ) had two daughters: Sterope (Στερόπη) and , and a number of sons. Another daughter, (Σθενέλη), was given by the "" as the wife of and mother of .
Mythology.
After the return of the Argonauts, Acastus's sisters were manipulated by to cut their father Pelias in pieces and boil them. Acastus, when he heard this, buried his father, and drove Jason and Medea from Iolcus (and, according to , his sisters also), and instituted funeral games in honor of his father. He thereafter became king of Iolcus.
Acastus purified of the murder of of . Acastus's wife (variously named in mythology; often , but sometimes Hippolyte, daughter of ) fell in love with Peleus but he scorned her. Bitter, she sent a messenger to , Peleus's wife and daughter of Eurytion, to tell her that Peleus was to marry Acastus's daughter, .
Astydamia then told Acastus that Peleus had tried to rape her. Acastus took Peleus on a hunting trip and hid his sword while he slept, then abandoned him on to be killed by . The wise centaur (or the god ) returned Peleus' sword and Peleus managed to escape. With and the , Peleus sacked Iolcus, dismembered (and, in some accounts, Acastus himself), and marched his army between the pieces. Their kingdom later fell to Jason's son .