Welf Isanbart von ALTDORF, Count in THURGAU & Irmentrude Thiedrada von Nagolzau de ALEMANNI 
They had a son named Guelph I (Welf) Duke of.
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Personal Details
Welf Isanbart von ALTDORF, Count in THURGAU
Welf Isanbart von was born about 0755 in Altdorf, Uri Canton, Switzerland. Welf Isanbart von is no longer alive.
Irmentrude Thiedrada von Nagolzau de ALEMANNI
Irmentrude Thiedrada von Nagolzau de was born about 0750 in Nagolzau, Alemanni Territory, (Swabia, germany). She died after 0776.
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Children
Guelph I (Welf) Duke of BAVARIA
Guelph I (Welf) Duke of was born about 0775 in Altdorf, Uri Canton, Switzerland.