User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-4430596-20130705160221/@comment-4649443-20130715031625

According to my Greek Mythology book, Pallas was a mortal friend of Athena(or Athene) who she accidentally killed when they were playing "catch the shield." That's why her full name is Pallas Athena, to commemorate her friend.