Epicaste was the name Homer used for
Jocasta. It is not clear what it means: perhaps it comes from a word formed from epi, 'before' and cazo (in the form cosmeo), 'to adorn' (compare Castor). This could mean 'fore-adorned', with reference to her name being changed to Jocasta (the Greek form is locaste) when her fate changed. Robert Graves impressively suggests that the
meaning could be 'upsetting over', with the name being a worn-down form of epicatastrephomene.
