Phaethusa
In Greek mythology, Phaethusa or Phaëthusa /ˌfeɪəˈθjuːzə/ (Ancient Greek: Φαέθουσα Phaéthousa, "radiance") was a daughter of Helios and Neaera, the personification of the brilliant, blinding rays of the sun. With her sister, Lampetia, she guarded the cattle of Thrinacia.