Isis
i'sis, the chief goddess of the Egyptians. She was the sister and wife of Osiris, their chief deity. He represented the sun. She represented the moon. The cow and the lotus were sacred to her. The figure of Isis, oftentimes adorned with the horns of a cow, appears frequently in Egyptian art, especially in the adornment of cave temples and elsewhere. See Osiris
Volume III · Aiton’s Encyclopedia