What rights does a father have to name their child?

Question Details: I am 30 weeks pregnant. My ex left me when I was 4 months pregnant and hasn't really been around for any of the pregnancy when we were together or after. He does, however, have this hang up about the baby's last name. And is now stating that he will take me to court to have the name hyphenated to include both of our last names, if I don't agree to do it myself. Does he have the right to do that, or is there even a percentage that he could get a judge to agree to it? I have tried to do research online about things like that happening but there really isn't much out there.

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