1. Was it written in the Constitution (in effect in the 1910s when Alexander married Aspasia) that a member of the royal family could not marry a commoner or specifically a Greek commoner?
Here are the articles that interest us, concerning the laws of succesion and regency according to the 1910 Constitution ( from
The Greek Constitutions 1822 -1952:Greece's Constitutional History by Alexandros Svolos p.153 -154):
Article 45. The Greek Crown and its constitutional rights are succesive and are to be inherited by the direct, true and legal descentants of King George the First in order of birth seniority, with preference over the males.
Article 46. In case there is no heir fulfilling the above decided criteria, the King is to appoint one with the Consent of the Parliament, which is to be assembled for this purpose, given( the consent) by the vote of the 2/3 of the members of the parliament and through a non secret voting.
Article 47. Everyone who is possible heir to the Throne is demanded to be a member of the Eastern Orthodox Church of Jesus Christ.
Article 48. Never are the Crowns of Greece and any other State to be merged in one head.
It is not stated it the constitution that a Greek royal was not allowed to marry a Greek commoner .Concerning the King's consent, it is not stated among the King's powers in the constitution( articles 29 to 44) that he has the power to recognize or not the marriages of members of his family. So the Constitution didn't care if a marriage of a Greek royal was recognized as dynastic or not, the children resulting from this marriage were eligible to inherit the Throne , as long as their parents were legally married.
The Greek Family Law of that time stated that:
a) A marriage between to Greek citizens was legal only if religious. Civil weddings for Greek citizens were viewed as invalid and non existing.
b) In order to get married the person involed had to be of age and to have in free will agreed to the marriage, otherwise having reach a certain age prior to their marriage. In the second case , the consent of their parents was neccesary.
c) they had to be either widowed or bachelors.
So according to both Greek Family Law and the Constitution the marriage between Aspasia and Alexander was perfectly legal, since they were two bachelors Eastern Orthodox adults who in free will decided to get married in a religious ceremony. Alexandra was therefore a legitime offspring of Alexander and should in the line of succesion to the Greek Crown, as long as she wasn't a Crowned Queen of another country at the same time or change her religion. So even though she might not be a princess according to the Royal family, she had every right to be in the succesion among the other members of the family. And since at the time the succesion was viewed as semi salic ( although someone could question that) , she should be in the line of succesion right after Princess Catherine ( Constantine and Sophie's youngest daughters) .
I couldn't find any informations about Aspasia 's HRH status, but I made an interesting thought. At that time, it was stated by the Greek Family Law at after her marriage a woman was to carry her husband last name, and so were the children born during the marriage. So ,
since at the time the Greek Royal had no surname and they could only be indentified as Prince/Princess of Greece and Denmark
and since Aspasia and Alexandra were to have Alexander's surname
then Alexandra had to become Princess Alexandra of Greece and Denmark at the moment of her birth and Aspasia had to become Prinxess Alexander of Greece and Denmark at the moment of her marriage ( note that I am not adding the HRH style, just the title) in order to be indetified in the eyes to the Law as Alexander's daughter and wife respectively.