Men are useless with names-except to reject whatever we suggest lol!
No, my point is that because the French naming rules have improved, there are fewer hyphenated names since fewer are "forced" to do it, in order to have the name they really want. They can now simply give their child that name.
Since so many people have these double names, it's part of French tradition. I'm sure it'll come back in style at some point but for right now, I simply see more single names, both when I had my kids and at schools and daycares. Just make sure it doesn't have a strong association, even a good one. If you go with "Jean-Jacques", for example, your child will be forever hearing "like Goldman". Just check with a French friend before you hear about it later!
I had to laugh at the "Kevin" story. I was waiting for the elevator and talking to the neighbors whose son is named "Kevin". I said "Oh my son has an Irish name too". Ronan is both Breton and Irish, since both are Celtic. They looked at each other. "No" they cautiously told me "It's American". I laughed "Well, I'm American and I can confirm with you, it's a very typical, common Irish name!"
They looked crestfallen. Was I being tactless? No, just honest, but a bit brutally. It served her right, the way she parked in front of the building and let her boys run wild on the stairs when my babies were asleep.
What was really funny, was that their last name starts with an "O", a typical North African Jewish surname. So at first glance, his name looks really Irish. Of course I told them this. They didn't look happy but then I added, I'm 1/4th Irish myself (so they didn't dare complain lol!)