The Ramnulfids, or the House of Poitiers, were a French dynasty ruling the County of Poitou and Duchy of Aquitaine in the 9th through 12th centuries. Their power base shifted from Toulouse to Poitou. In the early 10th century, they contested the dominance of northern Aquitaine and the ducal title to the whole with the House of Auvergne. In 1032, they inherited the Duchy of Gascony, thus uniting it with Aquitaine. By the end of the 11th century they were the dominant power in the southwestern third of France. The founder of the family was Ramnulf I, who became count in 835.