A lot of people might assume this is pronounced CAL-lyn. The name is quite lazily constructed, unimaginative, and very typical these days. It's not exactly the classiest name out there, and this spelling doesn't make it any better, au contraire.
This is my name and it is pronounced Kah-lin. NOT Kay-lin. I disagree with the person that commented first; only one person in my life has gotten my name right the first time. They always call me Kay-lin.