Y is for Youth
Yet again, this letter does not exist in the Greek alphabet, but I managed to find something (it's only cheating a little!)
Hebe was the goddess of Youth (hehe) in Greek Mythology, and the personification of youth and immortality. She was the cupbearer for the gods and goddesses of Mount Olympus, serving them nectar and ambrosia. She was the daugher of Xeus and Hera and was married to the hero Heracles when he arrived at the home of the gods.
|By Francisco Javier Ramos y Albertos [Public domain], via Wikimedia Commons|