His father was killed in 866 during a fight against his relative Landri, Count of Saintes, and his two sons Aymar and Adalelm were too young to ensure the defense and management of Angoulême and Périgueux, which were the strongholds of Emenon.
In 890, Ramnulf II, Duke of Aquitaine and Count of Poitiers, died in Paris, leaving his county to his son Ebles Manzer, still a child, under the care of Géraud d'Aurillac.
Not wanting to intervene directly, he encouraged his relative Aymar to attack Géraud and Ebles whilst entrusting him with the royal army.
At the head of this army, Aymar took Poitiers in September 892 and forced Géraud and Ebles to take refuge in Auvergne.
Sancia was the victim of an assassination attempt in 918 by the Viscount of Marcillac Lambert, and his brother Arnaud, for which they were executed.