Ok, putting this right upfront: it's the name of a creature in World of Warcraft. I like it.
I googled it pretty extensively, because many of the names used for creatures in the game are at least based on other fantasy stories or legendary characters, but all I could find was a possibility that it means "pot" in Flemish. (please tell me if you know a meaning for it)
So, possible meanings and source aside ...
What would be your reaction to meeting a female person named Ruuzel in real life? Pronounced ROO-z'l.
- mirfak, steeled for your worst