Back to about the 9th century. Before that, the records are dubious.
There have been two interregnums. From 1135-1153, King Stephen and Queen Matilda each disputed the legtimacy of the other, and there was no effective monarch in place. Then from 1649-1660, Cromwell fulfilled the role of monarch without claiming the crown. But both times, there was still a royal family on the scene.
The British Royal Family The Norwegian Royal Family The Spanish Royal Family The Swedish Royal Family The Dutch Royal Family The Danish Royal Family The Belgian Royal Family The Thai Royal Family The Monegasque Princely Family The Luxembourgish Grand Ducal Family The Liechtensteiner Princely Family
92 years
the UK royal family is also the royal family of Australia
By the Grace of God, is the most common explanation as to why a Royal family is the Royal family.
The Royal Family of Spain is the Bourbon family.
royal family
A "Royal" is a shortened way of referring to a member of the Royal Family, usually the British Royal Family.
the russian royal family
There is no french royal family
yes and no. The British Royal Family is the royal family of Fiji but not in Fiji. They visit on certain occasions
Of course. Cleopatra's family was the royal family.
The royal family comes from the danish royal family, the Schleswig-Holstein-Glücksburg-Sonderburg. Though, if any surname is to be used for the Norwegian royal family, it is "Rex".