Middle Names

[CyrilSebastian]

How often does a Princess/Queen have Regina as a middle name?   
Archduchess Maria Anna Josepha Antonia Regina of Austria became Queen of Portugal. She was the wife of King John V of Portugal.

[kinan]

We know that some "commoner" women married into royalty have middle names too.

We have
Catherine Elizabeth Middleton;
Mary Elizabeth Donaldson;
Marie Agathe Odile Cavallier;
Alexandra Christina Manley;
Sofia Kristina Hellqvist:
Mathilde Marie Christine Ghislaine d'Udekem d'Acoz;
Stephanie Marie Claudine Christine de Lannoy;

What about
Letizia Ortiz Rocasolano, Maxima Zorreguieta Cerruti and Mette-Marit Tjessem Høiby ?
Do they have middle names?
I know that Catholics tend to have more middle names and Letizia and Maxima are from Catholic families.

[CyrilSebastian]

Anne of Austria, Queen of France, was the wife of King Louis XIV of France. Originally she was Anna Maria Mauricia.

[CyrilSebastian]

Which Royal lady had Gasparine as a middle name? Princess Eleonore Caroline Gasparine Louise Reuss-Kostritz was Tsaritsa of Bulgaria and the second wife of Ferdinand I of Bulgaria

[CyrilSebastian]

How often does a Royal have Norberto as a middle name? King Joseph I of Portugal is Joseph Francisco Antonio Inacio Norberto Apostinho.

[CyrilSebastian]

When does a Royal have the name of Nepomuk?   
King George of Saxony (1832-1904) was Friedrich August Georg Ludwig Wilhelm Maximilian Karl Maria Nepomuk Baptist Xaver Cyriacus Romanus.