That was his real name, real person, someone even interviewed him and then bitcoin blew up, then he recanted... is my recollection of the story. Obviously that was the same. I think the idea that nobody knows who it is is sort of urban legend at this point. This sort of reminds me of a joke that Norm Macdonald did which was originally by George Miller..

https://www.youtube.com/watch?v=i4Xtglzk6JY

So yeah, maybe it was a different Satoshi Nakamoto.