Previously questions were raised why the header Benelux royals only referred to Belgium and Luxembourg. While the Netherlands had its own separate header.
The Benelux is a politico-economic union of three neighbouring states, and the name Benelux is formed from joining the first two or three letters of each country's name ? Belgium, Netherlands, Luxembourg.
So options would be IMO
1. Main header 'Benelux royals', with three subheadings Belgium Royals, Dutch Royals and Luxembourg royals (so separately, not merged).
2. Main headers for each of the 3 (Belgian Royals, Dutch royals and Luxemburg royals)
I have to confess the 2nd option had my preference. Especially as I noticed the Scandinavian countries have their seperate main headings, and are not gathered as subheadings of for example "Scandinavian royals'. And heck, even Monaco has its own main header.
Also I don't know why Belgium and Luxemburg are merged. To me its a bit confusing. Ok, the royals of Belgium and Luxemburg are heavy linked, but why no seperate headers?