I've seen it in lists as Ivanna. I know the other Slavic countries have Ivana. It's interesting that you say it's dated and boring. That's what someone Russian told me when I said I like the pet name Vanya for Ivan - it's an old man's name and for a peasant, she said!
Ivana was the most popular girl's name here 20-30 years ago, and I always had 4 or 5 in my classes (and they hated it). Ana was the second most popular, and we're all a bit tired of them here.