William the Good (French: Guillaume le Bon) was the count of Bordeaux in the final decades of the 10th century.
On his death the County of Bordeaux passed to Duke William Sánchez of Gascony.
An early 11th-century notice attributed to Hugh, bishop of Agen, in the History of the Abbey of Condom (Latin Historia abbatiae Condomensis) says that at the time when William the Good was captured, probably by Vikings, Hugh's uncle, Duke William of Gascony, made a donation to the Abbey of Condom, which Hugh had founded.
This is supported by a papal bull issued by Urban II on 27 April 1099, which states that "William of good memory, the count of Bordeaux, by his right granted" the abbey an endowment and the right to rebuild.
[3] According to documents from Sainte-Croix, William's father was Raymond and his mother was Entregodis (Andregoto), probably the daughter of that name of Duke García II Sánchez of Gascony.