Guillaume I the Pious Wilhelmid d'Aquitain, Count of Auvergne, Marquis of Gothia, was born circa 862 to Bernard Plantapilosa (841-886) and Ermengarde d'Auvergne (-aft883) and died 6 July 918 of unspecified causes. He married Engelberge de Provence (?-?) 898 JL .
|Offspring of Guillaume I d'Aquitaine and Engelberge de Provence (?-?)|
|Boso d'Aquitaine (-c923)|
|Ermengarde of Aquitaine (?-?)||Rotbold of Arles (c907-936)|