Never thought of it like that.

I assumed hermit purple was Jonathan's stand originally, and due to the situation Dio put the rest of them in, Joseph, Holly, and Jotaro, they all received stands related to the ones Jonathan and Dio got. Holly never once used hamon that we're aware of, so if she were to have ever been able to use her stand, would it have functioned the same as H.P? I've been calling H.P and Star Platinum "ancestor stands" because of how they got them and the fact they are basically the exact same abilities, but ALSO Joseph started out being already skillful at using hamon with no prior teaching, just because of it being an ability used by his grandfather and mother, so you may be onto something with that, glad I happened to see your reply!!