Wow, this is definitely not an "Array" name in my view, but why not? :)
I'd say ahr-ee-AHD-nee. ahr-ee-ADD-nee sounds really weird. It's either ahr-ee-AHD-nee or air-ee-ADD-nee to me, and combining the two just doesn't work. But it's a nice name said ahr-ee-AHD-nee, though I'm afraid I don't like the other pronunciations at all.
I prefer
Ariana and
Arianne /
Ariane, but I'm quite sure you'll hate them, heh.