Can a Katherine get away with Cassie?

Since most people just shorten whatever their name is as do most people who know then, i don't think it'd work. If you identify yourself as Cassie fom the start, then you could probably get people to catch on. My name is Bryauna (Bree-on-uh) I get called brianna all the time (bree-ann-uh) it may seem little but it drives me crazy. When i started high school i identified myself as Bree to my teachers and friends. Now most of my friends don't even know my real name! :P Hope i helped!