Sancho IV Garcés (Basque: Antzo Gartzia, Gascon: Sans Gassia French: Sanche;[1] died 950 or 955) was the duke of Gascony from 930 until his death.
On his father's death, he inherited the duchy itself, which included the viscounties of Lomagen, Gavarret, Tursan, and Bruillois.
[2] His younger brothers, William and Arnold, inherited Fézensac (including Armagnac) and Astarac respectively with the comital title.
In 932, Flodoard records that the brothers Ermengol of Rouergue and Raymond Pons of Toulouse, Princes of Gothia, brought a "Lupus Aznar Vasco" with them to do homage to Rudolph of France.
A third son was Gombald, a noted pluralist bishop, who held the various sees of Gascony as one until being reappointed to the long-vacant archdiocese of Bordeaux.