Possible Clues:

• This is more than once on the Nile or on the Thames
• Nature goddess of the Nile
• Deity's dual existence at Oxford
• Is getting to Oxford at the double
• Goddess -- one affectionate way to address girl
• Kin of Osiris
• Egyptian goddess, the wife of Osiris
• Goddess represented wearing a solar disk
• Isaiah represents divinity
• Goddess is number one female