I've never heard of the
Jonas Brothers but I hate the name
Jonas so much. Not sure why, but I do. I doubt it's too much associated with the
Jonas Brothers, though.
Nor do I think
Cyrus is too associated with
Miley. I grant that once in a while, in the case of a name that is very unusual or unique, it can be too associated with a celebrity, but let's not carry it to the point that any name borne by a celebrity automatically becomes unusable.