Does it mean anything when men talk about what they would name their future child(ren)?

So I was telling my best friend about a conversation I had with the guy I’ve been casually seeing. I was telling her how I asked about his name and he went on talking about naming his future kids this and that. For me this was just a casual conversation, I didn’t see it as an implication to anything deeper than that. But my best friend argues that guys don’t usually mention or talk about naming their kids unless they’re into the girl they’re talking to about it with.

Is it a big deal when men starts talking about that? If so, why? Or why not. Thank you for your insight/perspective on this in advance!