Graf in Schwaben Welf I (von Altdorf), Graf in Schwaben
- Born: Abt 776, Altdorf, Landshut, Bavaria, Germany
- Marriage (1): Heilwig de Ponthieu-Altdorf Äbtissin von Chelles about 796 in Bayern, Germany (historical: Bavaria, Duchy of Bavaria, East Francia, Germany)
- Died: 3 Oct 825, Swabia, Bavaria aged about 49
- Buried: 830, Weingarten, Ravensburg, Baden-Württemberg, Germany
FamilySearch ID: 9W4D-4YP.
Welf married Heilwig de Ponthieu-Altdorf Äbtissin von Chelles, daughter of Isanbart Graf im Thurgau and Theodrada von Soissons, about 796 in Bayern, Germany (historical: Bavaria, Duchy of Bavaria, East Francia, Germany). (Heilwig de Ponthieu-Altdorf Äbtissin von Chelles was born about 770 in Altdorf, Titting, Eichstätt, Bavaria, Germany, died on 19 Apr 843 in Chelles, Seine-et-Marne, Île-de-France, France and was buried in Weingarten, Ravensburg, Baden-Württemberg, Germany.)
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