Prince William and Kate Middleton just quietly changed their titles

During a recent official visit to Scotland, royal watchers noticed something that caused a bit of confusion. Prince William and Princess Kate were not being introduced as the Prince and Princess of Wales. Instead, locals and official schedules referred to them as the Duke and Duchess of Rothesay.
For those unfamiliar with royal tradition, the change sounded unusual. But in reality, it follows a long established rule that dates back centuries and is still observed today.
A title rooted in Scottish history
North of the English border, the heir to the throne uses a different set of titles. In Scotland, Prince William is known as the Duke of Rothesay and Kate as the Duchess of Rothesay. Royal author Robert Jobson explained that this tradition goes back to a time when Scotland was a separate kingdom.

The title was first created in 1396 and was traditionally given to the eldest son of the Scottish monarch. It has been passed down through generations ever since. While the Prince of Wales title applies across the rest of the UK, Rothesay is specifically used in Scotland as a sign of respect for its distinct royal heritage.
There is also an important condition. The title can only be inherited by the first male heir. This means Prince George is expected to receive it once William eventually becomes king.
Not the only titles they hold

The Duke and Duchess of Rothesay are far from the only titles William and Kate carry. They are also known as the Duke and Duchess of Cornwall and the Earl and Countess of Chester. Each title reflects different regions and traditions within the United Kingdom.
More changes are already on the horizon. Earlier this year, King Charles III granted them the authority to become Grantors of Royal Warrants. This means that from spring onwards, they will be able to officially endorse brands and businesses that supply goods or services to their household, a role traditionally reserved for senior royals.
In time, all of these titles will be replaced by the ultimate ones of King and Queen. Until then, their ever changing names serve as a reminder of how deeply layered and symbolic the royal system still is, even in modern Britain.