#3 sounds most natural to me. It's the only one of the three I'd use. #1 sounds awkward.
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Mister Micawber What bothers me is 'How to name'—do you mean 'what to name', or are you speaking of the process?I meant the process.
Masanori TakaokaWhat I wanted to say is "How to decide who should name a baby ~".Then you can stick with 'how'.