The fact is that all the empires of Europe got dissolved a long time ago; so legally speaking, there are no more Imperial Highnesses around. Even the titles themselves are only unofficial, respected largely in social circles. To the best of my knowledge, only titles in reigning monarchies are legal, and can be officially used on passports.
That being said, Liechtenstein is willing to respect the royal rank of the wife of Hereditary Prince Aloys, since that's what she was born to (notwithstanding the fact that the house of Wittelsbach got deposed a century ago). As such, she is styled as HRH Hereditary Princess Sophie.
But the Benelux princesses are adopting the higher titles and qualifiers of husbands who belong to non-reigning foreign dynasties. That's why I question how their native countries deal with them.
« Back to index