County of Fézensac
The County of Fézensac was an 8th-century creation on the north-eastern fringes of the Duchy of Gascony following Charlemagne's policy of feudalisation and Frankish colonisation. The move was aimed at offsetting and undermining the authority of the duke of Gascony Lupo II after the setback suffered by the Franks at the Battle of Roncevaux in 778 and failure to restrain the Basques. That advance clearly displeased the Basques, with these policies sparking a stir on the banks of the Garonne (Count of Toulouse Chorso defeated by Odalric "Wasco").
The county was appointed to a count called Burgund, who judging by his name was not a Basque. Burgund died in about 801 and was replaced by a certain Liutard, who was alien to the territory. The new appointment and his fresh military arrangements were met with the hostility of important local officials, who staged a rebellion, burning alive supporters of the new count. Ultimately, the rebellion was quelled and the instigators punished.
However, in 864 we hear of Arnold, Sancho Sanchez's nephew and a native from the area, holding the title of count of Fezensac.
Later in 926, after the death of García II, the Fézensac was given as an appanage to García's second-eldest son William. It included the cities of Vic and Auch, its capital, as well as the territory of Armagnac.
- Liutard, count of Fezensac then count of Paris (816).
House of Gascony
House of Armagnac
- married to Etiennette of la Barthe.
House of Lomagne
1215-1219 : Géraud V d'Armagnac († 1219), count of Armagnac and of Fézensac, son of Bernard of Lomagne, viscount of Fésenzaguet (son of Odon of Lomagne and Mascarose of Armagnac, daughter of Géraud III).
- married to Agnes.
- married to Mascarose I of Armagnac († 1245), daughter of Géraud V.
- married in 1255 to Mascarose II of Armagnac († 1256), daughter of Arnaud Odon and Mascarose I of Armagnac.
- married in 1260 to Mathe of Béarn.
- married to à Isabelle of lbret († 1 décembre 1294)
- married in en 1298 to Cécile of Rodez (1275 † 1313)
- married in 1327 to Béatrice of Clermont († 1364), countess of Charolais
- married in 1359 to Jeanne of Périgord.
- married in 1378 to Marguerite countess of Comminges.
- married to Bonne of Berry (1365 † 1435).
- married in 1407 to Blanche of Bretagne (1395 † 1419), and after in 1419 to Isabelle of Évreux (1395 † 1450)
- married in 1469 to Jeanne of Foix.
- married in 1468 to Catherine of Foix († 1510)
House of Alençon
- married in 1509 to Marguerite of France (1492-1549), sister of François I of France.
House of Albret
- married in 1527 to Marguerite of France (1492 † 1549)
- married in 1548 to Antoine of Bourbon (1518 † 1562), duke of Vendôme.
House of Guise
In 1645, the county of Fezensac is given with the county of Armagnac to Henri of Lorraine-Guise (1601 † 1666), count of Harcourt