Quote Originally Posted by Kyuuen View Post
I believe that when they say "Original" they mean original to XIV that it doesn't show up in previous iterations of FF, not that it's an original concept.
Well technically Sussano appeared in Mobius as a card, Final Fantasy Legendas enemies and Braverly Default as a summon (It's FF in everything but name) I know him from Mobius but had to look on the wiki for the others

http://finalfantasy.wikia.com/wiki/Susano-O

I guess they just took the - O off for XIV.