I'm not really worried about him picking up his new name - quick and easy with a clicker. I'm worried over myself adjusting to a new name, lol! Plus I get anxiety over whether I'll like a certain name forever. I'm picky. Unfortunately no to 'Charlie', it's a common name as well. I do like the name Charlie, but there's too many just like 'Duke'.
*Sometimes I wish I'd spelt it differently though because a lot of people call her a boy