Heilwig de Ponthieu-Altdorf Äbtissin von Chelles
- Born: Abt 770, Altdorf, Titting, Eichstätt, Bavaria, Germany
- Marriage (1): Graf in Schwaben Welf I (von Altdorf), Graf in Schwaben about 796 in Bayern, Germany (historical: Bavaria, Duchy of Bavaria, East Francia, Germany)
- Died: 19 Apr 843, Chelles, Seine-et-Marne, Île-de-France, France aged about 73
- Buried: Weingarten, Ravensburg, Baden-Württemberg, Germany
FamilySearch ID: 9HXY-TD8.
Heilwig married Graf in Schwaben Welf I (von Altdorf), Graf in Schwaben, son of Rothard Di Friuli Graf in Argen and Ermenane, about 796 in Bayern, Germany (historical: Bavaria, Duchy of Bavaria, East Francia, Germany). (Graf in Schwaben Welf I (von Altdorf), Graf in Schwaben was born about 776 in Altdorf, Landshut, Bavaria, Germany, died on 3 Oct 825 in Swabia, Bavaria and was buried in 830 in Weingarten, Ravensburg, Baden-Württemberg, Germany.)
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