Sibling for brother Stanton

My husband and I are in disagreement over a girl's name for baby #2. Brother Stanton has a strong yet unique name. It is a family name and we love it but are unable to come up with an equally strong and unique name for a little girl. We have the following names left on the acceptable list only. 

Ann London ( we would call her this)

London

Catherine (nickname would be Kit)

 

The middle name for Catherine would be London. I fear that Catherine is too common now and the Ann London is too long of a first name as our last name is pronounced (Cha-Cow-Ski). We are all out of ideas. Please feel free to be honest with all opinions and I look forward to reading your thoughts!

 

Thank you!