I would suggest you to go on Wikipedia and search a little bit because many eidolons come from various religions and mythology. You'll be shocked but Bahamut is a vast fish that supports the earth in Arabian mythology and Odin is considered the chief god in Norse paganism and the ruler of Asgard
As for you question, only thing that comes to my mind is that I improved little my English by playing FF. As for Roman Numerals didn't you learn those in school, I know I did.
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