The Viscounty of Dax first appears in the eleventh century. The viscounts were descended from Duke Sancho IV of Gascony. While the dukes had acquired the powers of a count in the , the territory around Dax, by the tenth century, it was the viscounts who exercised these powers in practice in the eleventh.
The first recorded viscount was Arnaud Loup, who was dead by 1020. He was a son of Loup Aner, , a grandson of Sancho IV. At the death of Arnaud II around 1034, the viscounty was disputed between his sons, Raymond Arnaud and Garcie Arnaud, who became viscount of . In 1089, Raymond Arnaud's son Navar was killed during a conflict with Viscount Centule V of Béarn, who seized the viscounty, but eventually restored it to Navar's nephew, Pierre Arnaud, who was succeeded by his sister, Guiraude, who married her third cousin, Arnaud Dat. Aranud Dat's grandson, Pierre II, was killed in 1177 in a war against Duke Richard the Lionheart, who seized the viscounty. It was not restored.
List of viscounts Arnaud I Loup (died before 1020) Arnaud II (died around 1034), son of Arnaud I Raymond I Arnaud (died around 1088), son of Arnaud II Navar (died 1089), son of Raymond I Pierre I Arnaud (), son of Arnaud III Raymond, brother of Navar Guiraude, daughter of Arnaud III Raymond Arnaud Dat, married Guiraude Raymond II Arnaud (died 1167), son of Guiraude and Arnaud Dat Pierre II (died 1177), son of Raymond II
Arnaud Dat was descended in th emale line from Arnaud Loup through his son Garcie Arnaud, who became viscount of and Ostabarret. Pierre II had a daughter, Navarra, who married Raymond Arnaud, viscount of Tartas. Raymond II had a younger son, Navar, who became bishop of Couserans.
References
Bibliography