In Homer's Odyssey, Medon is the faithful herald of Odysseus' household on Ithaca. He overhears the suitors' plots, warns Penelope, and survives the slaughter in the hall when Telemachus intercedes — later speaking to the Ithacan assembly in defence of Odysseus' vengeance. Distinct from Iliadic Medons (Locrian half-brother of Ajax Oileus, Antenor's Trojan son) and from the cruel Dulichian suitor of the same name.
Adapted from Wikipedia, "Medon (mythology)" · CC BY-SA 4.0
I.Herald of the house
Medon serves as the palace herald while Odysseus is abroad. He carries news of the suitors' ambush against Telemachus and of their later schemes; Penelope trusts his reports. When Odysseus and Telemachus turn on the wooers, Medon hides beneath a chair; Telemachus asks that the blameless herald be spared.
After the killing he appears before the people of Ithaca, arguing that the gods sanctioned the deed and that the suitors' excesses had invited ruin — a rare named survivor who bridges the blood-feud and the island's unsettled peace.
II.Homonyms
The Medon (mythology) index lists many others: a Locrian captain who leads Philoctetes' men and dies by Aeneas; a Trojan son of Antenor; a Dulichian suitor slain with the rest (atlas id medon-dulichium); centaurs, pirates, and later Argive or Athenian rulers. The atlas id medon-ithaca is Homer's Ithacan herald alone.