Ersa was the goddess of the plant-nourishing dew. She was a daughter of the sky-god Zeus and moon-goddess Selene. Ersa may be the same as Pandeia, a daughter of the same gods described in the Homeric Hymns. Another Ersa, described as a daughter of Kekrops, was worshipped by the Athenians. And Ersa had many kids and she was good.