Lunatea, from one of my favorite games Klonoa 2: Lunatea's Veil. It was the name of my main ACNL town too, and I named my alts after the kingdoms in the game, Volk and Joilant.
I named mine Moondrop. I saw a post on Reddit with a whole bunch of words you could combine together for island names and I settled on this one. I'm really happy with it
Vatican because my friends made a joke about naming yourself Pope and your island the Vatican...I didn't name myself Pope but I did like Vatican as an island name.