The title "Countess of Strathearn" is a Scottish noble title traditionally held by the wife of the Earl of Strathearn. It is associated with the region of Strathearn in Perthshire, Scotland. The title has historical significance and is often linked to the Scottish royal family. In modern times, the title is notably held by the wife of the Duke of Cambridge, who is also known as Prince William. The title reflects the couple's connection to Scotland and is part of the broader system of British peerage, which includes various ranks and titles within the nobility.