Eidothea (or Idothea, or Ido) was the daughter of Proteus, the 'Old Man of the Sea'. Her name means 'divine form', from eidos, 'that which is seen', 'form' and thea, 'goddess'. This could mean either that she herself had a 'divine form', that is, a heavenly appearance, or that she saw things with the eyes of a goddess.