Mentor in Greek and Roman Biography and Mythology
3. A son of Alcimus and a friend of Odysseus, who, on quitting
Ithaca, entrusted to him the care of his house. (Hom. Od.
2.226, &c., 22.235.) Athena assumed his appearance when she
conducted Telemachus to Pylos. (Od. 2.269, 402, 3.13, &c.,
4.654.) On Odysseus' return, Mentor assisted him in the
contest with the suitors, and brought about a reconciliation
between him and the people (22.206, 24.445, &c.). - A
Dictionary of Greek and Roman biography and mythology, William
Mentor in Wikipedia
In Greek mythology, Mentor (Greek: Μέντωρ / Méntōr; gen.:
Μέντορος) was the son of Alcumus and, in his old age, a
friend of Odysseus. When Odysseus left for the Trojan War he
placed Mentor in charge of his son, Telemachus, and of his
palace. When Athena visited Telemachus she took the disguise
of Mentor to hide herself from the suitors of Telemachus'
mother Penelope. As Mentor, the goddess encourages
Telemachus to stand up against the suitors and go abroad to
find out what happened to his father.
When Odysseus returns to Ithaca, Athena (in the form of
Mentor) takes the form of a swallow and the suitors' arrows
have no effect on him...