I've met a lot of people with unique names - at least to me, as they came from a variety of countries (where it wouldn't have sounded strange).
I love Mirko for a boy.
I have a friend called Calliope - lovely name, and never met a second, she was named after her Greek grandma. I know a French girl called Helix, which sounds really cool to me. Also, I like Ilka for a girl. My OH's grandma is called Genevra, which is pretty unique too.