Helle

When Phrixus was about to be sacrificed by his father Athamas, Nephele grabbed Phrixus and Helle and sent them away on a golden ram, a gift to her from Hermes.

While the ram was crossing the strait between Greece and Asia, Helle lost her grip and fell to her death.  It is from this that the Hellespont (the sea of Helle) gets it's name.

Source(s):

  1. ApollodorusBibliotece.