France: On April 8, 1931, Prince Henri VI, Count of Paris (1908–1999) married Princess Isabelle of Orléans-Braganza.
Their son, Prince Henri VII, Count of Paris (1933-2019) married Duchess Marie Therese of Württemberg on July 5, 1957.
I was wondering about each example of this, in the reigning European monarchies. For the sake of convenience, I'm restricting the definition of *equality* to the first two sections of the ALMANACH DE GOTHA (meaning houses that are sovereign, formerly reigning, or mediatized).
Great Britain: Her Majesty the Queen and the Duke of Edinburgh (born Prince Philip of Greece and Denmark), 1947
Norway: King Olaf V and Princess Martha of Sweden (parents of the present king), 1929
Sweden: Princess Birgitta and Prince Johann Georg of Hohenzollern-Sigmaringen (of course, the union was not dynastic with respect to the house of Bernadotte, for reasons that females had no succession rights as of their marriage in 1961. Still, it involved a member of the Swedish royal family, and hence was certainly dynastic with respect to the husband's house)
Denmark: Princess Benedikte and Prince Richard of Sayn-Wittgenstein-Berleburg (1968)
The Netherlands: Princess Irene and Carlos Hugo, Duke of Parma (of course, their marriage in 1964 was non-dynastic, for reasons that it did not receive the consent of Parliament)
Belgium: Princess Astrid and Archduke Lorenz of Austria-Este (1984)
Spain: King Juan Carlos and Princess Sophie of Greece and Denmark, 1962
Luxembourg: Princess Margaretha and Prince Nikolaos of Liechtenstein, 1982 (six weeks after her older sister, Princess Marie-Astrid, married Archduke Carl Christian of Austria)
Liechtenstein: Hereditary Prince Alois and Princess Sophie, Duchess in Bavaria, 1993
Monaco: Princess Caroline and Ernst August, The Prince of Hanover, 1999
Is all this accurate? Like I said, I had to be practical in determining what qualifies as an *equal* marriage, and therefore had to exclude the 1994 union of Prince Guillaume of Luxembourg and Sybilla Weillur. The fact that she has plenty of blue blood in her ancestry does not change the fact that she technically was not born a dynastic member of any house listed in the first two tiers of the ALMANACH.