Example Of Welcome Letter In Infant Room Story Character Names: Okay To Use The Same First Letter For Two Main Characters?

Story character names: okay to use the same first letter for two main characters? - example of welcome letter in infant room

Example: Ashley and Anna
Casey, Caroline
Brooke and Brittany

I will have three main characters, and I want some names Lou, Lark and Angeline. Do you think that the names are too similar? I really want to use Lou, but .. I have to use Lark as a character is an Indian American will not use names that are too wild, but only those that are easy and good, but clearly are assigned to Indians.

Do you believe that your property?
Suggestions are welcome (: