The Weird Sisters -- Phoebe , Selene , and Luna -- were a Triple Goddess of powerful magic users named after three Greco - Roman goddesses of the Moon .
The Weird Sisters -- Phoebe , Selene , and Luna -- based on the witches from Shakespeare 's Macbeth .
The Weird Sisters -- Phoebe , Selene , and Luna -- were a Triple Goddess of powerful magic users named after three Greco - Roman goddesses of the Moon and based on the witches from Shakespeare 's Macbeth .