Who was the Trojan son of Antenor killed by Agamemnon?

Iphidamas was the Trojan son of Antenor killed by Agamemnon. Their encounter occurs in Book 11 of Homer's Iliad, during Agamemnon's fierce advance against the Trojan army.

Iphidamas had been raised in Thrace and returned to Troy to defend his homeland. He struck at Agamemnon, but his spear failed to penetrate the king's silver-studded belt. Agamemnon seized the spear and killed him with a sword blow to the neck.

The death leads immediately to another clash. Iphidamas's brother Coön tries to drag away his body and wounds Agamemnon, but Agamemnon recovers and kills Coön as well. This detail can cause confusion because both brothers die at Agamemnon's hands in the same episode.

Iphidamas was one of several sons of Antenor, the Trojan elder who advised returning Helen and avoiding war. Other Antenorids in the poem include Agenor, Archelochus, Acamas, and Polydamas is not one of them; Polydamas was the son of Panthous.