Baby boy name help!

Having a hard time deciding on our first baby boy name. My husbands family typically uses  the father or grandfather's name as a middle name. His father passed away, so we have thought about using his name, Charles as a middle name.  My side of the family typically uses an initial from someone who has passed. Since I lost my brother at a very young age, I have also considered using his name, Michael as a middle name. I cannot think of any other 'm' names to use as a first name that goes with Charles as a middle name.  We both like the name Carter for a first name, but are not 100%. Any suggestions are welcome! Thanks!