Baby name help, please!

My husband and I are due with baby #2 any day now and have been debating the baby's name for months. We disagree not on the name, but on how to spell it. We'd like to name the baby Branko/Bronco after my father in law. Branko is the traditional Serbian spelling and how my FIL spells it. Hence, my Serbian husband wants to spell it hat way. But it's pronounced Bronco, which spelling is phonetically correct and, I suppose, more American, which is where we live.  I prefer Bronco, because I want people to pronounce his name correctly and don't want to set him up for a lifetime of confusion and having to correct people. And I still think it pays appropriate homage to my FIL (who doesn't know we are considering the name). If we can't agree, I'm afraid we'll just have to pick another name which is just too bad.  We could ask the FIL but we prefer not to share the name before birth.  Help!  Please!  Any suggestions?