*Welf (Guelph) I von Altdorf
born about 0818 Altdorf, Schwaben, Bayern

father:
*Conrad I d'Argengau Count of Auxerre
born about 0800 Burgundy, France

mother:
*Adelaide de Tours
born about 0802 Tours, France
died about 0866

siblings:
*Conrad II Count of Auxerre Margarve of Bourgogne born 0825 Burgundy, France
died about 0887

spouse:
unknown

children:
*Eticho I von Altdorf
born about 0850 Altdorf, Schwaben, Bayern

biographical and/or anecdotal:

notes or source:
ancestry.com
LDS