How to announce baby name to in-laws that might not like it?

The name Katrina Lynn is very unique and pretty! I wouldn't exactly care what they think because she is you're child and if you would like to name her Katrina you can! Calling her Katie for short is very cute. If you call her Katie most of the time, it probably wouldn't matter as much to them. I think you should tell them the day she was born because then they'll be so happy it won't bother them too much and if you change the name you want, you won't have to bother telling them what the new name is! Congratulations and best of luck!