Behind April comes the goddess Maia. Her father was named Atlas, and it was supposed that the weight of this vast round world on which we live, with all its mountains and oceans and deep mines, rested upon the shoulders of Atlas. He had seven daughters who lived in a mountain, and Maia was the most famous of all these seven daughters because of her son Mercury, who ran swiftly from Heaven to Earth on errands for the gods and goddesses. Jupiter, the father of all the gods took Maia and her sisters and placed them near together as stars in the sky. the cluster of six stars called the Pleiades is supposed to be Maia and her sisters. The seventh star of the cluster is invisible. It represents one of the sisters who married a man named Sisyphus, and even had been condemned to roll a stone up a hill eternally, she has hidden her face with sorrow. (from an encyclopaedia)