Iphis (who was actually another girl disguised as a boy so that she could do this). Her name seems to mean 'violet flower', from ion, 'violet' and anthos, 'flower'.
She was the daughter of Telestes of Crete, and her name would seem to be merely a 'pretty' one, with no special significance. (It resembles the name Iolanthe, familiar to lovers of Gilbert and Sullivan. This is not a name in Greek mythology, however. If it was, it too would mean 'violet', since it is really a form of Violetta via French Yolande.)