The name Subola, precedent of present-day Soule and Zuberoa, is attested for the first time in 635, when a column of a Franco-Burgundian expedition led by Duke Arnebert against the Basques was defeated by them.
The name Subola, an earlier designation for the region now known as Soule and Zuberoa, is documented for the first time in 635. A Franco-Burgundian military campaign, led by Duke Arnebert, was unsuccessful against the Basques.