User blog comment:Bullet Francisco/The Origin of Your Username/@comment-11644326-20130706050759

Admiral: Two ranks above Sea Captain

Leviathan: The biggest ancient monster of the sea in certain mythologies

So logically Leviathan = an Admiral compared to other sea monsters.

So that, or the fact that I recently finished playing FF8, where Leviathan was my favorite summon, and I added "Admiral" to the front because I recently took a vacation to Mobile, where they have a Battleship dry-docked.

Oh, and "Levithan" is a Typo, because Wiki won't let me change it to properly include the "a".