Should I name my son after my father-in-law or just use his middle name?

I have four more months before my baby is due. I agreed with my husband to name our son after his father. I told my husband that I am not doing it for his father; I am doing it for my husband. My husband new at the beginning that I was against naming our son after his father. My husband told his father that if he has son that he will name his son after his father. His father really wants his grandson to be named after him. This is before I ever met my husband that he made a promise to name our son after his father. My husband wouldn’t even comprise on using his dad’s middle name. My husband said that it has to be the whole name or nothing and that’s what his father wants too. I really don’t want Michael William Harmon the name I fell in love with is Blake William Harmon. The problem I am having is if I name my son after his father I will recent his family and if I name my son the name I want with his father’s middle name then my husband’s family will recent me. I am getting really pissed off with my husband because I am carrying the baby for 9 months and delivery the baby. I should have a say in my son’s name. What do you think I should do?