Yes, Vittorio-Emanuelle II's wife was ADss Adelheid of Habsburg.
His daughter Maria Pia married king D.Luis of Portugal.
Ferdinando II, last but one king of the TS was married to ADss Theresa of Habsburg.
Alfonso XII of Spain married ADss Maria Cristina of Habsburg.
Leopold II of Belgium married ADss Marie-Henriette of Habsburg.
Ludwig III of Bavaria married ADss Maria-Theresa of Habsburg-Este.
Pr. Franz Josef II of Liechtenstein's mother was ADss Elisabeth-Amalia of Habsburg
Friederich-August III of Saxony was unfortunately married to Louise of Habsburg-Tuscany.
Are the Hapsburgs related in any ways with former reigning houses in Italy and southern Europe. Any elsewhere?
My phone glitched out and I accidentally sent another message (with my own name spelled incorrectly!).
All European royal families are related (except for Montenegro) because they have Frederick I, Margrave of Brandenburg-Ansbach and Sophia Jagiellon, Princess of Poland as their most recent common ancestors.
Of course, various clusters will be more closely related on religious grounds, etc. I also want to add that there is no such thing as an “archduke of Habsburg”, Habsburg only very lately figured into the civil names of members of this family.