Ra, also known as Re, was god of the creation and the Sun in Egyptian mythology.
According to the creation story of Heliopolis, Ra (or Atum) originated from the water of Nun, being the first of the gods and the progenitor of all other deities. He sired the gods Shu and Tefnut, who became the gods of wind and rain. At some point Ra got separated from his children, but eventually found them again, which led him to cry in joy and the tears would become the first humans.
Ra and his children would continued to expand the universe, with Shu and Tefnut having children of their own, Geb and Nut, who were the land and the sky. These two then sired the next generation of deities: Osiris, Isis, Nephthys and Set, who ruled over the humans as the first royal family. He is also the father of Hathor, Sekhmet, Bastet, Satet, Anhur, and Ma'at.
Ra would eventually become the sun and travel across the sky, always avoiding to be devoured by the chaotic serpent Apep. He was replaced by Osiris, whose line continued through Horus and eventually the human-pharaohs.