Why do some people call Rosalie, Rosaline?

If u means fans of they book, then maybe thats how they see it..Like u know how people may have perceived Bella to look different of whatever, maybe it similar to that. For example, my cousins always saw Renée as meer like Rennie (lol). So it could be that. Although Ive never heard anyone call her that.

they do? well then people cant read

Perhaps they take the romeo and juliet comparison a bit too far??
i don't know why they do but some people do. Simple mistake??