AKA Rey Horus used to go by the name El Hijo del Rey Mysterio? BUUUT he's not the actual 'Hijo de Rey Mysterio" that is cousins with Rey Rey and nephew with Rey Misterio Sr.

Dragon Azteca took over the Hijo de Rey Mysterio mask when the original (WWE Rey's cousin) retired, but later he un-retired and so Dragon Azteca took the name of Rey Horus.

I found this interesting since in Lucha Underground, Azteca is Rey Mysterio's protege

I did know this, but I never actually connected the dots to their kayfabe LU connection.