Isembart I D' ALTDORF 
He had a biological son named Isembart II.
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Personal Details
Isembart I D' ALTDORF
Isembart I was born about 0700 in Altdorf, Uri Canton, Switzerland. He died in 0736.
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Children
Isembart II D' ALTDORF
Isembart II was born about 0700 in Altdorf, Uri Canton, Switzerland. He died in 0772.