Telegonus

Circe then sent Telegonus to find Odysseus after he had finally returned to Ithaca from the Trojan War, but on arrival Telegonus began plundering the city, thinking it was Corcyra. Odysseus and his oldest son, Telemachus, defended their city and Telegonus accidentally killed his father with the spine of a stingray. He brought the body back to Aeaea and took Penelope, Odysseus' widow, and Telemachus, Odysseus' son, with him. Circe made them immortal and married Telemachus, while Telegonus made Penelope his wife. With Penelope, he was the father of Italus.

See also The Odyssey