The Duke of Biron is a title in the French nobility, historically associated with the House of Biron. The title was created in the 17th century and is linked to the region of Gascony. The dukedom has a rich history, with notable figures such as Charles de Gontaut-Biron, who served as a military leader and was involved in the political intrigues of his time. The title has been held by various members of the nobility, and it reflects the social hierarchy of France before the French Revolution. The Duke of Biron is often remembered for its connections to the royal court and the influence of the nobility in shaping French history.