Married to Hedwig av THURGAU 778-843 with
F Judith av BAYERN 797-843
M Conrad av AUXERRE 801-864
M Rudolph av PONTHIEU 802-866
F Emma av BAYERN 803-876

Welf is the first documented ancestor of the Elder House of Welf. He is mentioned as a count (comes) in the Frankish lands of Bavaria. Welf originated from a distinguished dynasty of Franconian nobles. He is mentioned only once: on the occasion of the wedding of his daughter Judith with Emperor Louis the Pious in 819 at Aachen. His son Conrad later appeared as a dux (duke) in Alamannia and achieved a powerful position in the Upper Swabian estates he possibly had inherited from his mother Hedwig (Heilwig).The younger sons of the first count of Altdorf, Conrad and Rudolf accompanied their sister to the court of her husband, Louis the Pious, where their ambitious spirit maintained their hereditary rank, and where they shared the happy, as well as the adverse fortunes of that sister. When Judith was surprised and confined by her stepsons, her brothers were shaven as monks but claimed and obtained permission to stand beside the throne. Judith's sister Hemma (* 808 † 876) later married Judith's stepson Louis the German and became Queen of the Franks.

His family became politically powerful when Louis the Pious chose his oldest daughter as his 2nd wife upon the death of his consort Ermengarde of Hesbaye. Though Welf himself never became publicly prominent, his family became interwoven with the Carolingian dynasty.

Gift med
Hedwig av Thurgau, född 778 i Altdorf, Weingarten, Baden-Württemberg, Tyskland, död 843 i Regensburg, Bayern, Tyskland. Grevinna av Altdorf 819-825.

Barn:
Judith av Bayern, född 797, död 843-04-19
Conrad av Auxerre, född 801, död 864