Egyptian goddess of the sky and wife of Geb, the god of earth. Mother of Osiris, Isis, Seth, and Nephthys. She is represented as a naked woman often in an arched position over her husband and is depicted on the inside of coffins as a protector of the dead.
See also Religion.
Historical Dictionary Of Ancient Egypt by Morris L. Bierbrier
Ancient Egypt. A Reference Guide. EdwART. 2011.