I joined a company last week, and one of my co-workers (not on my specific team, but still part of our overarching team) has a pretty unique/interesting name. I Googled it out of curiosity and learned that he was formerly part of a band in a genre of music that I happen to really enjoy. It sounds like a great opportunity to break the ice and get to know another member of the company and to chat about common interests, but I'm worried that I'll come across as a creep if I just mention it without context, since it'll be obvious that I googled this person. I also haven't actually spoken to them/gotten to know them (because again, we're on different teams). What would be the most sensitive course of action?
Don't. Just don't. Ever mention google. If you find yourself in a social situation with this person, just say "that's an unusual name! the drummer in one of my favorite bands had the same, did you ever hear of them?". And let the conversation flow naturally from there. Since you're a real fan, you won't come across as a creep, like you would otherwise.
I've been in exactly the same position before. Ended up on a Facebook profile of a colleague that had shared interests wich I did not know of. Never, ever mention you googled his name. It would creep most people out.
A clever way to mention your shared interests what you found is turning the tables. In one of your next conversations, you could let him find out that you like that specific music genre. Try to lead the conversation towards "what's your favourite music genre." or something like that. It's a common topic at the coffee machine or during lunch break.