Okies, let's say they have just a single god, like Christianity, Islam and Judaism, and just call him/her god. Only, when Taizee broke the surface, she did eventually come people adhering to a whole pantheon of dieties, and perhaps with a little persuasion from a missionary, perhaps from inside of her, she decided to beleive that her god was a part of this phanteon, and to the surface world held the name of Sarenrae.