I still think it shouldn't stand for anything. How about we claim that the name is so powerful that it we hear it, we die.
Or that it is so sacred that we can never say it, like the Jewish
Tetragrammaton, the name of the God of Israel, which we never say. Ever ever.
Ancient Jewish tradition said that the name could only be said by the High Cohen, on Yom Kippur, inside the First or Second Temples of Jerusalem (the First being the Temple of Solomon). Which pretty much means it could only be said by the holiest person on Earth, at the holiest time of the year, at the holiest place on Earth. Most people didn't even know what the name was. During prayer, Jews say fillers words, and when not during prayer, we just say Hashem, which literally means "The Name" in Hebrew. So it could be like that.
Or alternatively, we could just do like nabaxo said and tell each team it stands for something different. That would just be hilarious! We'd need to think of five different things.
I like the AMAZON's Mighty Alliance of the Zenobian Omnipotent Nations. Then to make it make sense (for we'd be one civilization, not an alliance of several) we could make our civ divided into city-state type things, like in Ancient Greece, where Athens and Sparta would have two different governments. So then they would be an alliance, like a confederacy.
But that would be our story to just one team, we'd need 4 more of those. And they need to contradict each other as much as possible. Like for instance the next one could include a legend of how the universe was created by an ancient dragon with seven heads (Hydra?) who made the Sun out of his fiery breath, and he ruled over the universe for many thousands of years, and when he was ready to die he curled up into a ball and became the Earth on which we live on today. But he had a bunch of fleas on his body (we won't provide any explanation of how they got there

). And it gets even weirder.
No, we aren't descendants of those fleas, cause that would just be too simple. No, the fleas were gods, and each one had been sucking the blood of the great dragon from a different head, and each head did different things, so the fleas gained special powers based on the head that they had been living on. And they became the great gods that the AMAZONs worship. One made the sea, one the trees, etc. etc. Then after that the seven god-fleas wove their spirits into one and left their great bodies as a mountain and flew into the sky, exploding and creating a bunch of sparkles in the sky (the stars). Then one of the pieces fell back down on the mountain and where it struck there was a volcano, that erupted a while later.
The only problem was the Earth was still the great body of the seven-headed dragon in his sleep, and when the volcano erupted and matter came out from within the body, some of the dragons' soul came out and
that became life. And to this day our civ still worships AMAZON, the Awesome Monster that Attacks Z_____ Of N_______
That was long.
