Hi Mark, I think it might be a hangover from the start of the Scottish Clans project - I've found a lot of these older profiles have the project-protected sticker without an associated project. You could add the Scottish_Clans tag to your question to attract the attention of one of the leaders or, if you're feeling brave, you could just edit the relevant profiles since you're already a member of the project.
Edited to add, you could also add the Euroaristo tag to attract that project's attention as the family are members of the aristocracy.