I'd say it aloud and the one that gives you a smile is the right one. My friend named me and I rolled with it. It gave me the biggest smile.
With that being said, I like Veronika. Or Veronica.

I like the V's and I love the longer names. More elegant. You can shorten it to Monika for a nickname. Your nickname is nearly as important as your legal name.
I'm ear to ear smiles when I use my name aloud. It makes me feel good when I hear it. I was named Victoria... but Tori also gets me giddy. So it's 100% about how it makes you feel. Victoria Quinn aka (Harley). So many awesome nicknames when my friends get going. All of them make me smile.