1 Sthenelus, father of Eurystheus, was a son of Perseus. For the manner of Eurystheus' death see Isoc. 4.60.
2 Tyndareus, son of Perieres and of Perseus' daughter, Gorgophone, was king of Lacedaemon until driven out by his half-brother Hippocoön and by Hippocoön's sons. See Apollod. 3.10.5.
3 Heracles slew Hippocoön and his twenty sons and restored Tyndareus.
4 Castor was slain during a foray in Messene. His brother, Polydeuces, who according to most accounts was a son of Zeus by Leda, while Castor was a son of Tyndareus by Leda, refused to accept immortality unless it was shared by his brother. Zeus, therefore, granted that the two brothers dwell, on alternate days, among the gods and among men. According to others both were sons of Zeus. Hence Isocrates can refer to their kinship with Heracles, the son of Zeus and Alcmene. See Apollod. 3.11.2 and Isoc. 10.61.