- Princesses Irene and Christina of The Netherlands
- The reigning houses of Liechtenstein and Monaco (Belgium, Luxembourg and Spain)
- The former reigning houses of Austria, Tuscany and Modena (Habsburg), France (Orleans, Napoleon, Bourbon), Brazil (Orleans-Braganca), Portugal (Braganca), Italy (Savoy, Savoy-Aosta), Parma (Bourbon-Parma), The Two Sicilies (Bourbon-Two-Sicilies, Hohenzollern (Hohenzollern-Sigmaringen), Wurttemberg (Wurttemberg), Bavaria (Wittelsbach), Saxony (Wettin).
- The mediatised houses of: Arenberg, Auersperg, Castell (partly), Colloredo u. Mansfeld, Croy, Esterhazy, Fugger, Furstenberg, Harrach, Hohenlohe (partly), Isenburg, Khevenmuller-Metsch, Konigsegg-Aulendorf, Kuefstein, Leyen, Looz & Corswarem, Lowenstein, Metternich, Neipperg, Oettingen (partly), Orsini & Rosenberg, Ortenburg (partly), Pappenheim, Quadt, Rechberg, Salm (partly), Sayn (partly), Schaesberg, Schonborn, Schonburg, Schwarzenberg, Thurn u. Taxis, Toerring (partly), Trauttmansdorff, Walbott von Bassenheim, Waldburg, Windisch-Graetz, Wurmbrand-Stuppach.
I don't know if Birgitta of Sweden (sister of the King) has converted, she is married to a catholic prince (of Hohenzollern). I believe the house of Saxe-Meiningen is catholic these days as well, although it was traditionally a protestant family.