Don Royal Families have a ton of names?
They certainly used to – but not as many as you might expect, these days – plus many of the names are not names, but lands they hold title to – for example, a Prince of Schleswig – Holstein – Sonderburg – Glucksburg may be Prince of those lands – not named after them. A long time ago, the British Royal Family adopted Windsor as a surname, to distance themselves from their German ancestry – not a popular origin in the UK in the early 20th century – so Queen Elizabeth is a Windsor. When she married Philip, she chose to become Elizabeth Mountbatten-Windsor, adopting Philip’s adopted family name, so their offspring are Mountbatten-Wndsors. She didn’t have to do that; as Queen, she had the choice, Philip didn’t.