This man tested a hero's bravery by driving that man's cattle from (*) Marathon and subsequently befriended that hero.
This man's sister Physadeia was once taken hostage by Castor and Pollux; she later became a handmaiden of Helen of Troy. An alternate myth holds that this man was killed by a big dog after trying to abduct the daughter of the Molossian king Aedoneus. In the Metamorphoses, this man claims that the gods do not actually have the power to change their shape, prompting Achelous to tell the story of Philemon and Baucis. This man tested a hero's bravery by driving that man's cattle from (*) Marathon and subsequently befriended that hero. A sudden earthquake convinced Heracles not to rescue this man; thus, he is still bound to the Chair of Forgetfulness for trying to abduct Persephone. That occurred after the death of this man's wife Hippodamia, whose marriage to this man provoked the Centauromachy. For 10 points, name this bosom companion of Theseus, the mythological king of the Lapiths.
This man's sister Physadeia was once taken hostage by Castor and Pollux; she later became a handmaiden of Helen of Troy.
Pirithous [or Peirithoos]