I don't think it's everywhere. I posted on it some time ago (Scarlet) and I think it inspired one or two other Scarlett thread but apart from that I don't hear it a lot. The ones I do hear a lot are Alexander, William, Florian, Helena, Astrid and some others. When I asked to rate other people's names I think I rated Helena and Astrid at least 10 times and also Susannah, Oliver etc multiple times.