William García (died 960) was a Count of Fézensac. He was the second son of García II of Gascony and Amuna.

When García II died in or around 926, he gave Gascony

Gascony

Gascony is an area of southwest France that was part of the "Province of Guyenne and Gascony" prior to the French Revolution. The region is vaguely defined and the distinction between Guyenne and Gascony is unclear; sometimes they are considered to overlap, and sometimes Gascony is considered a...

 to his eldest son Sancho IV and created appanage

Appanage

An apanage or appanage or is the grant of an estate, titles, offices, or other things of value to the younger male children of a sovereign, who would otherwise have no inheritance under the system of primogeniture...

s for his younger sons: Fézensac for William and Astarac

Astarac

Astarac is a region in Gascony, a county in the Middle Ages. It was formed as a county out of the partition of the Duchy of Gascony amongst his son following the death of García II Sánchez. The youngest son, Arnold I, received Astarac....

 for Arnold

Arnold I of Astarac

Arnold I García was the first Count of Astarac from 926.Arnold was the youngest son of García II Sánchez of Gascony and Amuna. When García died, his duchy was divided between his heirs. The eldest Sancho inherited Gascony itself, while the second, William, inherited Fézensac...

. Fézensac included Auch

Auch

Auch is a commune in southwestern France. Located in the region of Midi-Pyrénées, it is the capital of the Gers department. Auch is the historical capital of Gascony.-The Ausci:...

, Vic

Vic-Fezensac

Vic-Fezensac is commune in the Gers department in southwestern France.-Geography:The Auzoue flows north through the western part of the commune and forms most of its north-western border....

, and the Armagnac

Armagnac (region)

The hilly countship of Armagnac , in the foothills of the Pyrenées between the Adour and Garonne rivers, is a historic countship of the Duchy of Gascony, established in 601 in Aquitaine...

.

William himself divided his county amongst his heirs:

• Odo
  Odo of Fézensac
  Odo was the second Count of Fézensac from 960 to his death.Odo was the eldest son and successor of William Garcés. Odo's younger brother Bernard received Armagnac in a partition of their father's territory....
  
  , successor in Fézensac
• Bernard
  Bernard I of Armagnac
  Bernard I , called the Suspicious, was the first Count of Armagnac.He was the second son of William Garcés of Fézensac. When William died in 960, he divided his county up, giving Fézensac to his eldest son Odo, Armagnac to Bernard, and Gause to the youngest son Fredelon.For his many sins, Bernard...
  
  , received Armagnac
• Fredelon, received Gause
  Gause
  -People:*Georgii Gause, Russian biologist*Jesse Gause, early leader in the Latter Day Saint movement*Paul Gause, American college basketball player*Rufus Hollis Gause, US theologian-Schools in the United States:...
  
  
• Garsinda, married Raymond II of Ribagorza