To go back a generation, I remember Hans Adams' mother, Princess Georgiana (I think that is how her name is spelled) - she was a Hungarian Countess. She was very vivacious and attended a lot of royal weddings - she was very visible while her much older husband (Prince Franz Joseph) was very retiring. Her picture was in the press a lot. They both died in the same year. She died from cancer - I remember having seen a photo of her at a royal wedding taken just a few months before her death and she looked wonderful - who knew?
Hans Adam's wife, Princess Marie, was the governess of the younger children
in the family and that is how she and Hans Adam met.
Princess Georgiana was not pleased and I can't imagine how she treated her daughter-in-law all of those years. (Shades of Josephine-Charlotte!)