I'm pretty sure that's how it's spelled. It's pronounced RIE-kus.
This is my husband's cousin's son's name (he's probably about 12). I think that his parents named him after a book character. He's the only person I'd ever heard of with that name, but then my mom told me that she went to church with an older man named Rikus. I can't find anything about it. Does anyone know anything about this name?