Multiple HPs?

In continuation of my previous idea: what if a (d20-styled) adventurer had multiple XPs and multiple HPs, each named after different gods?

You're a Barbarian. You have X hp from god A, Y hp from god B and Z xp from goddess Z?
It seems hard to remember. Writing it down on a character sheet, however, would remove the problem.
Hmm...that raises some questions.
The god of Fighters, the goddess of Magic, the goddess of Shadows? How many gods should there be?
Do I want a god of Songs, a goddess of Fertility?
Split the god of Fighters in a god of Excelence (with his sub-aspect of Arts and sub-aspect of Crafts) and a god of Violence?

The important question, if I decide to go there, are two:
Does "gods' Vitality" apply to different body locations, making it a hit location system?
And do the NPCs get "demon HP", or can adventurers gain it by dealing with demons as well? How does it interact with the HP granted by gods?
Decisions, decisions!