Amaterasu - goddess of the sun
Tsukuyomi - god of the moon
Left eye of horus - the moon.
However, in the asian mythos, when Izanagi washed his face after his journey to the underworld to save Izanami, it was Amaterasu who came from the left eye and Tsukuyomi who came from the right.
Naruto is a very interesting series in its symbolism. Complete with Kaguya-Hime, the princess from the moon in the tale of the Bamboo Cutter.