What should I do about this?!?!

Chaunte
Ok so I have two kids from a previous marriage, a boy and a girl. My son got named after his dad being the IV in their generation. I am currently divorced and with my new love. Found out I'm pregnant (9 wks according to the app) and my bf wants to name this child after him and his dad making the child the III. I seriously don't want two boys named after their dads. Makes me uncomfortable and this is now a huge fight! Is there any suggestions on whether or not to do this? I feel like it's almost a lost cause and I'm scared to stress myself out with this issue 😒😞😩Advice plzzzz