Tydeus was a son of Oeneus, king of Calydon, by his second wife Periboea or his daughter (sic) Gorge. He was a warrior with the Seven Against Thebes, and his belligerence may be indicated in his name if we derive it from thyo, 'to rush along', 'dart along' (compare Thyreus). But if we are looking for an 'incident' name, we may be able to find it in tymma, 'thump', 'blow', for Tydeus killed his brother Melanippus when out hunting, although he maintained that this was accidental.