Which Greek hero was the son of Tydeus?

The Greek hero who was the son of Tydeus was Diomedes. In Greek mythology and Homer’s Iliad, Diomedes is the son of the warrior Tydeus and Deipyle, daughter of the Argive king Adrastus.

Tydeus was one of the Seven Against Thebes and died during the failed expedition against the city. Diomedes later joined the Epigoni, the sons of the fallen champions, and helped complete the conquest of Thebes. He eventually became king of Argos and later fought among the leading Greek commanders at Troy.

In the Iliad, Diomedes is one of the Achaeans’ most formidable warriors, ranking just below Achilles in battlefield prowess. Athena frequently supports him, and during one remarkable episode he wounds both Aphrodite and Ares, making him the only mortal to injure two Olympian gods in a single day.

The phrase “son of Tydeus” is a recurring poetic title for Diomedes. It is especially useful for distinguishing him from other Greek heroes such as Achilles, Ajax, and Odysseus.