Pardon my ignorance, I'm not very good with Belgian or Austria titles:
So Lili, Anna Astrid & Maximilian can be called "Prince(ss)", due to their other titles from the Austrian heritage, but not "Prince(ss) of Belgium" as that has to be created by decree?
Thus they are formally Archduke/Archduchess of Austria-Este?
Lili is legally Mrs. Elisabetta Maria Rosboch von Wolkenstein. This was her title and name in the decree with which she and Prince Amedeo were retroactively granted authorization to marry.
12 November 2015. - Koninklijk besluit houdende instemming met het huwelijk van Zijne Koninklijke Hoogheid Prins Amedeo, Prins van België, met Mevrouw Elisabetta Maria Rosboch von Wolkenstein
Enig artikel. Instemming wordt verleend met het huwelijk van Zijne Koninklijke Hoogheid Prins Amedeo, Prins van België, met Mevrouw Elisabetta Maria Rosboch von Wolkenstein, voltrokken op 5 juli 2014.
Translation:
Sole article. Consent is granted to the marriage of His Royal Highness Prince Amedeo, Prince of Belgium, to Mrs. Elisabetta Maria Rosboch von Wolkenstein, concluded on 5 July 2014.
However, the Palace refers to her with two courtesy styles:
1. Princess Amedeo of Belgium
2. Princess Elisabetta, without the designation "of Belgium"
For instance, she and her husband were Prince and Princess Amedeo of Belgium in the announcement of their daughter's name (see below), whereas they were Prince Amedeo and Princess Elisabetta without the "of Belgium" in
the announcement of their son's birth.
The Palace refers to their daughter as Princess Anna Astrid, likewise without the designation "of Belgium".
From another thread, here are the announcements on her title which came from the Palace:
- A palace spokesman confirmed that she would enjoy the title of princess.
- The Palace communicated that she was "Princess Anna Astrid" to Le Carnet Mondain, the yearbook of noble and distinguished Belgian families.
"Par contre, la petite Anna Astrid n'a ni titre ni nom dans « Le carnet mondain », étant simplement renseigné comme
« la princesse Anna Astrid » . Preuve de l'existence d'un royal problème ? Sachant, comme le précise le volumineux ouvrage mondain, que « les informations concernant la famille royale de belgique sont reproduites tellse qu'elles nous sont
communiquées par le Palais »."
Translation:
"In contrast, the little Anna Astrid has neither title nor surname in "Le carnet mondain", being listed as
"the princess Anna Astrid". Proof of the existence of a royal problem? Knowing the bulky work specifies that "information concerning the royal family of Belgium is reproduced from that which was
communicated to us by the Palace"."
La famille royale s'appelle à nouveau de Saxe-Cobourg
- The Palace communicated the same information to Place Royale. (Place Royale uses the term "Officiel" to describe information given from the Palace.)
"OFFICIEL Le bébé du Prince et de la Princesse Amedeo de Belgique est la
Princesse Anna Astrid @MonarchieBe"
Translation:
"OFFICIAL The baby of Prince and Princess Amedeo of Belgium is
Princess Anna Astrid @MonarchieBe
- Letters from the household of Princess Astrid (one in English is pictured in the photograph
here) styled her granddaughter as Princess Anna Astrid.
"Their Royal Highnesses Princess Astrid, Prince Lorenz, Prince Amedeo and Princess Elisabetta thank you for the kind wishes you have sent on the occasion of the first birthday of our little sunshine Princess Anna Astrid.
Jan Matthysen
Ambassador (ret.)
Advisor to Princess Astrid"
On her Belgian birth certificate, her formal names and titles are HI&RH Princess Anna Astrid Marie, Archduchess of Austria-Este (Habsburg-Lorraine).
"A la rubrique « nom et prénoms »,
son acte de naissance porte en effet, comme nous avons pu le voir : «
Son Altesse Impériale et Royale la Princesse Anna Astrid Marie Archiduchesse d'Autriche-Este (Habsbourg-Lorraine) »."
Translation:
"In the column 'surname and given names',
her birth certificate uses, as a matter of fact, as we were able to see it:
'Her Imperial and Royal Highness Princess Anna Astrid Marie Archduchess of Austria-Este (Habsbourg-Lorraine)'."
Quel nom pour les princes qui ne seront plus «de Belgique»?
On whether Anna Astrid is a princess due to her Austrian titles/lineage or her Belgian lineage: I am not sure of the answer to this question, but my guess is that it is due to her lineage from King Leopold I of Belgium.
Firstly, because Lorenz was recognized in Belgium only as an Archduke, not a Prince, before he was created a Prince of Belgium.
Secondly, because article 4 of the Royal Decree of November 12, 2015 mentions Princes and Princesses who are not "of Belgium" and are born in direct descent from King Leopold I.
12 November 2015. - Koninklijk besluit betreffende de verlening van de titel van Prins of Prinses van België
Translation:
Article 1. In the public and private acts relating to them, the Princes and the Princesses, children and grandchildren, born in direct descendance from the King as well as the Princes and the Princesses, children and grandchildren, born in direct descendance from the Crown Prince or the Crown Princess carry the title of Prince or of Princess of Belgium following their first name and, so far as they carry them, their family name and their dynastic title and ahead of the other titles to which their ancestry gives them the right. Their first name is preceded by the predicate His or Her Royal Highness.
Article 2. In the public and private acts relating to them, the Princes and the Princesses, children and grandchildren, born in direct descendance from His Majesty King Albert II carry the title of Prince or of Princess of Belgium following their first name, and, so far as they carry them, their family name and their dynastic title and ahead of the other titles to which their ancestry gives them the right. Their first name is preceded by the predicate His or Her Royal Highness.
Article 3. The Princes and the Princesses who already carry the title of Prince or of Princess of Belgium pursuant to the Royal Decree of 14 March 1891 qualifying the Princes and Princesses born in direct male descendance from His late Majesty Leopold I to be Princes and Princesses of Belgium retain this title following their first name and, so far as they carry it, their family name and before the other titles to which their ancestry gives them the right. Their first name is preceded by the predicate His or Her Royal Highness.
Article 4. The Princes and Princesses, born in direct descendance from His Majesty Leopold, George, Christian, Frederick of Saxe-Coburg, who are not covered by Articles 1 to 3, carry following their first name and, so far as they carry it, their family name, the titles to which their ancestry gives them the right.