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 Hermengarde CAROLINGIANS. He was an only child. He died in Bavaria, Schawben, 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 Altdorf, Uri Canton Switzerland. She died in tours, Inder-et-Loire, France.