Siegfried of Regenstein-Blankenburg Count 
He had a biological son named Heinrich I of.
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Personal Details
Siegfried of Regenstein-Blankenburg Count
Siegfried of was born about 1120 in Regenstein,Saxony. He died after 1182.
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Children
Heinrich I of Regenstein-Blankenburg Count
Heinrich I of was born about 1150 in Regenstein,Saxony. Heinrich I of is no longer alive.
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