Quote Originally Posted by Enkidoh View Post
Phoenix's name was never mentioned, but by all descriptions it was Phoenix. Which raises the question, how did old man Louisoix come up with the same concept? I think we will never know.
This might be explainable by the hypothesis that the legend of a fiery bird that has power over rebirth is something that appears and spreads through many cultures and beliefs, hence Louisoix thinking about rebirth in the context of Phoenix, and also Suzaku being mistaken for a phoenix-like deity over in the Far East.

If we stretch the speculation a bit, there might be the possibility that all of it can be traced to that short story Amaurotine accidental creation and the racial memories thereof, but I also think it doesn't really need that common link. Sometimes similar concepts in myth can develop in parallel, and then resemble each other even more due to people from different cultures meeting each other and going "oh yeah, that sounds just like this thing we have", then going back and spreading that version. This could even be on purpose, for evangelizing, which happened all the time in RL all over the world.