Who recognized Odysseus immediately?

Odysseus was immediately recognized by his old nurse, Eurycleia, when he returned to Ithaca after the Trojan War. She identified him by a distinctive scar on his leg, which he had received during his youth while hunting boar. Eurycleia's recognition marked a pivotal moment in the story, as she vowed to keep his return a secret while he plotted to reclaim his home from the suitors.