The House of Courtenay was a noble family in medieval England, originating from the County of Devon. Established in the 12th century, it played a significant role in the politics and land ownership of the time. The family claimed descent from the ancient kings of France and held various titles, including the Earldom of Devon. Throughout its history, the House of Courtenay was involved in numerous conflicts, including the Wars of the Roses. The family also had connections to the Kingdom of Jerusalem, as they claimed the title of King of Jerusalem through marriage. Their influence waned over time, but their legacy remains in English history.