I kinda wanna call it Levi (short for Leviathan) because it looks the exact OPPOSITE of a leviathan. Cute, adorable and otherwise non-threatening. Just picture it having a terrible temper.

Levi is a really cute name, and I love the irony you bring up about the Leviathan from i believe the Book of Job in the bible?

And Final fantasy, and Atlantis, and... well, there are a lot of Leviathans. I just find the irony amusing

True enough, and will this Name also server her well in MLP?

In MLP, I'd probably go with Stormy Seas or Roaring Tides. Something more ocean themed than just a nickname like Levi. There really isn't a way to make THAT work for MLP, they're much more... gentle. Then again, it's a dragon so they dont use standard naming conventions, so yea, actually, Levi works. You know, going of Spike and the other dragons all having single word names with varying amount of meaning.

Sounds good. and phonetically, it's Leh-vee, right?

Yep!