What is the relationship between the British royal family and the royal family? What is the royal family? What is royalty?

There is no difference between the British royal family and the royal family. It is one of the oldest existing royal families in the world. It functions as a symbol of uniting national power and does not have substantive power. The king is the nominal ruler and is hereditary. The Prime Minister is the top leader of the British government, elected through popular election, and holds the highest administrative power. Although there is no strict legal or formal definition of membership, and different lists will have different members, those with the titles of King/Her Majesty (HM) or Prince/Princess (HRH) are generally regarded as members of the royal family

Her Majesty the Queen

His Royal Highness the Duke of Edinburgh (Prince Philip) (husband)

Crown Prince Charles (eldest son of the Queen, Prince of Wales)

Cornwall The Duchess (Princess Camilla)

The Duke and Duchess of Cambridge, Prince William and Princess Kate (the eldest son and wife of the Prince of Wales)

His Royal Highness Prince Harry (the second son of the Crown Prince)

His Royal Highness the Duke of York (the Queen's second son)

His Royal Highness Princess Beatrice (the eldest daughter of the Duke of York)

Her Royal Highness Princess Eugenie (the second daughter of the Duke of York)

Their Royal Highnesses the Earl and Countess of Essex (the Queen’s youngest son and wife)

Miss Louise Windsor (the daughter of the Earl and Countess of Essex)

Viscount Thelin (Essex) Son of the Earl and Countess of Sussex)

Her Royal Highness the Princess (the Queen's daughter)

The Duke and Duchess of Gloucester (the Queen's cousin and wife)

The Duke of Kent Couple (the Queen's cousin and his wife)

Prince Michael and his wife of Kent (the Queen's cousin and his wife)

Princess Alexandra, the Honorable Lady Ogilvy (the Queen's cousin)