Welf I von ALTDORF 
Welf I von was born in 0778 in Altdorf, uri Canton, Switzerland. Welf I von's father was Isembart II D' ALTDORF and his mother was Berthe D' ALEMANIE. His paternal grandfather was Isembart I D' ALTDORF; his maternal grandparents were Huoching D' ALEMANIE and Berthe de NEUSTRIA. He was an only child. He died in Bavaria, Schwaben, Germany.
They had a daughter named Judith Andech von.
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Children
Judith Andech von ALTDORF
Judith Andech von was born about 0800 in Altdof, Uri Canton, Switzerland. She died in Tours, Indre-et-Loire, Tourraine/ Centre, France.