I definitely think there would be lots of comments about a kid being named
Elvis. Maybe not necessarily bad ones, but it would just be surprising to hear and people would take note.
And yes! This happened with
Emil. I discovered it when I was a kid, looking for names for characters. I loved it and pronounced it EM-ul, like
Emily but without the ee. Years later, I find out that's wrong. Pssh. I have since been told, at least, that my pronunciation is legitimate in a few languages/places.