Opinions please!

My husband has two kids from a previous marriage. A son and daughter. Neither are named after him or family name. I'm 34 weeks and having a sudden change of heart on our name for our baby(his last kid) I had a very unique name picked out and now I'm trying to debate if I want to change the middle name to his daddy's middle name bc it's also his grandfathers middle name... 😩 this decision is hard lol family has given me a 50/50 input.