Polydorus

An Argive, son of Hippomedon. Pausanias lists him as one of the Epigoni, who attacked Thebes in retaliation for the deaths of their fathers, the Seven Against Thebes, who died attempting the same thing.
Polydorus, son of Cadmus and Harmonia, and father of Labdacus by his wife Nycteis, daughter of Nycteus.
A Trojan, and King Priam's youngest son during the Trojan War. He was sent with gifts of jewelry and gold to the court of King Polymestor to be kept safe during the Trojan War. The fighting was getting vicious and Priam was frightened for the child's safety. After Troy fell, Polymestor threw Polydorus to his death to take the treasure for himself. Hecuba, Polydorus' mother, eventually avenged her son. This story is depicted in Hecuba by Euripides.
Another Trojan, and another son of Priam. As recounted in Homer's Iliad, this Polydorus was a son of Priam and Laothoe, and fought during the Trojan War. He was slain by Achilles.
Polydorus was also the name of one of the three Rhodian sculptors who created the statue Laocoön and his Sons.