Famous Royal families include The British Royal Family, The Spanish Royal Family, The Grand Ducal Family of Luxembourg also know as the House of Nassau-Weilburg, The Ming Dynasty, The Dutch Royal family which is governed by members of the House of Orange-Nassau, The Danish Royal Family where the Queen’s children and male-line descendants belong agnatically to the family de Laborde de Monpezat and the House of Saud (Saudis).
The British Royal Family is the group of close relatives of the Monarch of the United Kingdom.
The term is also commonly applied to the same group of people as the relations of the monarch in his or her role as sovereign of any of the other Commonwealth realms, thus sometimes at variance with official national terms for the family.
Members of the royal family belong to, or are married into, the House of Windsor, since 1917, when George V changed the name of the royal house from Saxe-Coburg and Gotha. There is no strict legal or formal definition of who is or is not a member of the Royal Family.
The Grand Ducal Family of Luxembourg consists of the extended family of the sovereign Grand Duke. The medieval duchy of Luxembourg was elevated to a grand duchy in 1815 when William V, Prince of Orange ascended the grand ducal throne as its first holder.
The male-line descendants of Grand Duchess Charlotte hold the titles Prince(ss) of Luxembourg and Prince(ss) of Nassau with the style of His/Her Royal Highness (coming from their status as male-line descendants of Duke Robert of Parma). The title Prince of Bourbon-Parma was relinquished by Grand Duke Jean in 1986, but he and his relatives have kept the style of His/Her Royal Highness.