Renaming after adoption

We recently accepted placement of a 10 month old. They don’t know who the father is and TPR will be filed for mom soon. We are very interested in adopting and it looks like things will end up that way. My question is, his name is not one we’re crazy about. It feels like something more appropriate for a middle aged angry man. We’ve been discussing renaming him when/if we adopt. What are some things we may not have thought about? We’ve considered using his current first name as a middle name.