The Counts of Dreux were a noble family of France, who took their title from the chief stronghold of their domain, the château of Dreux, which lies near the boundary between Normandy and the Île-de-France. They are notable for inheriting the Duchy of Brittany through Pierre de Dreux's marriage to Alix de Thouars in the early 13th century.

The House of Albret, which derives its name from the lordship (seigneurie) of Albret (Labrit), situated in the Landes, was one of the most powerful feudal families of France and Navarre during the Middle Ages.