We have separate tags for the Roman and Greek mythologies, despite the fact that these mythologies are very closely intertwined - often even the same stories, only the actors having different names. Like the story of Venus / Aphrodite cheating Vulcanus / Hefaistos with Mars / Ares.
The native peoples of South America seem to have similarly intertwined pantheons. I'm not an expert on these religions, but as I understand it they are alike in a similar way to the Greek and Roman mythology.
Should we have separate tags for "Maya", "Inca" and "Aztec"?