I'm expecting my first in April. It's a boy and we're going to call him Charles Christian Jr., after his daddy. Both my father and my husband's father were also named Charles and were both called by their nickname Charlie. My husband goes by Christian, so I'd love to call our little boy Charlie. However, one of my nieces (5 Year old girl) who lives a few hours from us is named Charlie, after my late father. Should I avoid using the nickname Charlie, or does it matter? What would you do?