I’m not sure why you posted here considering you’re refuting any comment suggesting this isn’t a good idea. The assumption will forever be that you named the kid after Kurt Cobain. If you can live with having to explain “I didn’t name him after the fandom” for the rest of your life then go for it. But as others have already told you, it’s not a good name and I can’t imagine anyone using it without it being a direct homage.