From Ingrid's 18th birthday thread (
link):
Regarding the title stuff that has been discussed here:
Yes, Ingrid is described as ''HKH Prinsessen'' (''HRH The Princess'') on the first page of her profile on the Royal House website (and on the page for her decorations), which in all certainty is due to her being the future heir and Monarch.
Should also be said that the Norwegian Broadcasting Corporation (NRK) since 2015 has been doing the same thing when they have referred to members of the Royal House by only their styles/titles (and not by names) when they have appeared on the palace balcony on May 17th (Norway's Constitution Day). - While Sverre Magnus OTOH (who is not part of the Royal House and therefore not a Royal Highness) was described as ''Prince Sverre Magnus'' (and not just ''the Prince'').
A question regarding the title: has Harald or Haakon ever being addressed as HRH The Prince before they became Crown Prince and when their grandfather were still alive? Is it a "newly invented" formal title or just an informal one to indicate IA's position?
Think I will describe it as a referring-title to indicate her position as a future heir.
But all such titles are referring-titles, including ''His Majesty The King!'' I mean, it would have been a bit weird for the court to use his exact title, which is: Hans Majestet Harald V, Norges Konge (His Majesty Harald V, Norway's King).
But let's go a bit more into detail of what you asked about:
Harald and Haakon: Almost impossible to know how the royal court referred to members of the RF before they launched the royal website on New Year's Eve 1999. But I've seen from digital newspaper archives that the media mostly referred to them as Prince Harald and Prince Haakon Magnus. However, since the Norwegian media have always mostly referred to the royals by using their titles-plus-names and not their styles (with the exception of the monarch), they would probably still have referred to them as Prince Harald and Prince Haakon Magnus, regardless of what the royal court was calling them.
Ingrid: The court has referred to her as ''HRH The Princess'' on the first page of her profile-site (
link) for several years already.
Why is it done? Hmm, since they do it with the monarch/consort and the heir/wife, they probably thought it was a good idea to do it with the future heir as well.
However, she is described as ''HRH Princess Ingrid Alexandra'' in the official calendar, which is in contrast to her grandparents and parents, who are described as HM The King, HM The Queen, HRH The Crown Prince and HRH The Crown Princess.
So perhaps the court should make their minds up! Either she is HRH The Princess in the calendar as well, or she is HRH Princess Ingrid Alexandra on all platforms!
What about the media? Well, they mostly refer to her as Princess Ingrid Alexandra. But they also describe her as ''arveprinsessen'' (''the hereditary-princess'') and the ''princess.'' But they seldom use her style (something that is almost only done with the King, who is often referred to on television as HM The King or HM King Harald).
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BTW, I've seen that there was a discussion here in 2020 between the two posters ''Tatiana Maria'' and ''Somebody'' (in posts 64, 66, 67, 68 and 71) about whether Norwegian princes/princesses are just ''princes/princesses of nothing'' or ''princes/princesses of Norway'' (which is not clarified on the Royal House website or in the royal birth-statements from the court).
Hmmmmmmm, I do have a clear idea about it, but since it's going to be a pretty long post where I would have to write where I got the information from (etc), I have decided to do it after I'm done with the 18th birthday stuff and some other posts that I'm planning.