It is really personal - for some people it creates more pain, for others it is healing to give their baby an identity. I found it healing. I felt it was important and that she (or he) deserved it just as any other baby would have a name. This allowed for me to grieve better because it made it more real - for many of us who mc early we don't have much evidence of our baby's life or the memories of them in our tummies, but we can feel it in our hearts.. other people also seem to be more understanding of long term grief if it's real to them, so a name tends to make it more of a reality to those who didn't suffer it first hand. no matter what kind of name it is, like Iwant2beamum said, she calls hers her "may baby", I think that's beautiful, it is an identity in its own right. some women sense the gender and name their babies according to what their gut says. I think mine was a girl, but I still chose a unisex name. I named her Justice and gave her her father's last name as her middle name since we are not together. I make "soul certificates" (like certificates of life) for babies gone too soon, so I created one for her and have it framed on my wall in remembrance.
Maybe if you explain to your husband that you feel it would be healing in your grief journey to name your baby together he will understand.