Help! We can’t agree on a name

Ok so long story short is I had a baby boy from a previous marriage and we named him Vincent (Vinnie ) as a nod to my dad Vince.

Fast forward and I am now remarried and expecting a baby boy my husband wants to name after his dad. I have tried to explain the situation is different but he thinks I'm being unfair.

His name is John (Yianni in Greek) and I don't like it, not that I don't want to pay the same respect.

We already have a daughter together and we picked a name for her (not named after anyone)

Both children have Italian names and I would like baby to have that too.

Am I being unfair unreasonable?