Daughter name ideas?

We've made our short list: -Ellen -Bridget -Katherine -Erin -Julia This is our first child. Which one do you think is best? We want something on the more traditional side that will fit her for her whole life and not just as a little kid. Also, if we have a cousin already named Caitlin, is Katherine too... show more We've made our short list:
-Ellen
-Bridget
-Katherine
-Erin
-Julia

This is our first child. Which one do you think is best? We want something on the more traditional side that will fit her for her whole life and not just as a little kid. Also, if we have a cousin already named Caitlin, is Katherine too similar? We would use the full name or Kat not Kate/Katie. My husband also already has a cousin named Elizabeth too but she goes by Liz so I don't think it's too similar to Ellen.
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