Graiae

The Graiae are three daughters of Phorcys and Ceto.  Often simply called 'the Old Women', they are personification of old age - they were even born as old women.  Between them they share one eye and one tooth. 

In the adventures of Perseus, they are consulted for their amazing wisdom.  In order to gain knowledge on how to defeat Medusa, Perseus steals their eye and forces them to tell him a way.

ource(s):

  1. HesiodTheogeny.

  2. ApollodorusBibliotece.