Sometimes spelled Ajax. A Greek hero in the Trojan War whom Odysseus encounters in the Underworld. Aias killed himself after Odysseus was named a greater man than he, and still refuses to speak to his friend even after death. Odysseus is bummed about this: Aias, son of stately Telamon, could you then never even in death forget your anger against me, because of that cursed armor?(11.553-560).
In other words, it's probably enough to hold a grudge in life. You really don't need to hang onto it in death, too.