Greek form of Egyptian Ist
(reconstructed as Iset
), which possibly meant "the throne". In Egyptian mythology
Isis was the goddess of the sky and nature, the wife of Osiris
and the mother of Horus
. She was originally depicted wearing a throne-shaped headdress, but in later times she was conflated with the goddess Hathor
and depicted having the horns of a cow on her head. She was also worshipped by people outside of Egypt, such as the Greeks and Romans.