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Male Welf I von ALTDORF Click to view Welf I von ALTDORF in the family tree

Welf I von was born about 0778 in Altdorf, Uri Canton, Switzerland.  Welf I von's father was Isembart II D'ALTDORF and his mother was Hermengarde CAROLINGIANS.  His paternal grandparents were Engilbert II D' ALTDORF and Berthe  D' ALEMANNIA; his maternal grandparents were Pepin III 'The Short' King of the FRANKS and Berthe (Bertrada) 'Broadfoot' de LAON.  He was an only child.


Welf I von's family with Hedwig Engilwich WITTELSBACH

They had a son named Konrad I Duke of.