Kate Middleton and Prince William are popularly known as the Prince and Princess of Wales, but they have another little-known royal title in Scotland.

Prince William is set to receive a new title from his father, King Charles. On 16 May, the King and the Prince of Wales will attend the Service of the Order of the Bath at Westminster Abbey.

Prince William goes by many names. Prince of Wales? That’s him. Duke of Cornwall? Also him. He also answers to Duke of Rothesay, Lord of the Isles, and Baron Carrickfergus, among many titles ...

Prince William and Princess Kate were married April 29, 2011. See how they're celebrating their anniversary and look back at their relationship.

Wildlife rangers are being killed at a rate of nearly two a week, and it’s a toll Prince William has said the world can no longer ignore.

Prince William and Princess Kate were married April 29, 2011. See how they're celebrating their anniversary and look back at their relationship.

Up in Scotland, William is known as the Duke of Rothesay, Earl of Carrick, Lord of the Isles and Baron of Renfrew, meanwhile over in Ireland he is known as Baron Carrickfergus.

Kate Middleton and Prince William expanded their royal resumes when King Charles III recently gave them new military appointments. Here's a guide to all the titles the couple currently hold.

Prince William and Kate took a boat trip between Scottish islands today as they enjoy a two-day visit to the Inner Hebrides.

The royal couple is visiting the Isles of Mull and Iona for a two-day trip highlighting rural Scottish communities.

While in the Inner Hebrides, a chain of islands off the west coast of Scotland including Mull and Iona, Prince William and Princess Kate are known as the Lord and Lady of the Isles.