Well this one is not H.R.E but a papal creation with an ad infinitum,
so does that mean then that Emanuele dei Principi Ruspoli, 1st Prince
of di Poggio Suasa who came from a different branch of the family and
was a grandson of the 3rd Prince di Cerveteri. Does that mean then
that the ad infinitum would mean that he is a prince regardless? This
is the question that I am concerned about. On the matter of Italian
princely titles, I know that the Neapolitan, and for that matter
Spanish ones, if there are any of the latter still extant. Don't give
much weight to collateral members, the heir bearing a title, and don
and dona for the other issue of the title holder etc. What is of
interest are those created by the Sardinia/Savoy and the united Italy,
do these follow the holy Roman Empire rules ad infinitum? And finally
on this point, what are the rules governing papal princely titles
without the ad infinitum designation?