How did Athena get the nickname Pallas Athena?

Answer:
Athena and her companion Pallas were sparring with spears, when Athena accidently killed Pallas. As a sign of mourning for her lost friend, Athena placed Pallas' name in front of her ownher own: Pallas Athena.
First answer by Potato guy3. Last edit by Meat loaf lover. Contributor trust: 77 [recommend contributor recommended]. Question popularity: 2 [recommend question].