[Opinions] It's totally usable.
in reply to a message by Eva Marie
I grew up in a school that was full of all sorts of names - Hannibal, Jonai, Onari, Umhara, Juan, Zlata, Constantine, Bahar (those are just the ones I remember) and everyone got their names. Normally - I was called Haywood by a substitute teacher for a year, though. (My name is Haven and at the time I had a short haircut and looked boyish.) I don't see much of a problem with Sunniva, especially if you live in an urban area.