Character nickname question

[azelmaroark.livejournal.com]

Hey guys! Help me out with naming in a story I'm working on?

I'm pretty sure my main character goes by Kit, but it needs to be her nickname (this is relevant to the plot, I swear!). Whatever full name she has, I need to be able to get another nickname out of it that doesn't sound anything like Kit and isn't immediately recognizable as coming from the same full name, preferably starting with a different letter (example -- Anna and Stacy for Anastasia). I kind of feel like her full name is Katrina, but that's more or less open to change. So possibly nicknames for Katrina (it can be a stretch; I don't mind) that don't start with 'K' are ideal, but if you need to go with a different full name, go ahead and suggest.

She's told me pretty firmly that Kit is her name, but if you want to make a suggestion of a full name and two really different nicknames that you think would work well here, I wouldn't mind hearing it.

If you're really curious why this is relevant, I can tell you; I just wanted to make sure y'all knew that it wasn't just me being obsessed with nicknames again. ;)

For reference, this is for a elementary-school-aged girl born in the early 90s. Thanks!