Princess Royal
The title "Princess Royal" is traditionally given to the eldest daughter of the reigning monarch in the United Kingdom. It is a courtesy title, not a rank, and has been used since the 17th century. The current holder of the title is Princess Anne, the daughter of Queen Elizabeth II.
The title does not come with specific duties or privileges, but it is a mark of honor. The Princess Royal often represents the royal family at various events and engagements, supporting charitable organizations and public initiatives throughout the country and beyond.