Halfdan Sigurdsson 
He had a biological son named Sigurd Halfdansson of Ringerik.
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Personal Details
Halfdan Sigurdsson
Halfdan Sigurdsson was born about 0944 in .Oppland, Norway. Halfdan Sigurdsson is no longer alive.
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Children
Earl Sigurd Halfdansson of Ringerik
Sigurd Halfdansson of Ringerik was born about 0970 in , Ringerik, Norway. He died about 1018.
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