He was the oldest known ancestor of the Rorgonid family.
On onomastic considerations, he could be a descendant of the 8th-century Duke of Maine, Charivius.
[1] He is named in a document as being in the Spanish March on 2 April 812 with Charlemagne at a meeting of the Counts.
[2] He is also known from a charter on 1 March 839 signed by his son Rorgon sent to the Abbey of Saint-Maur de Glanfeuil.
In it, Rorgon names his family there: "My father Gauzlin and my mother Adeltrudis, and my brother Gauzbert.