*Halfdan Sigurdsson
born 0987 Ringerke, Akershus, Norway
died before 1047

father:
*Sigurd "Syr" Halfdansson
born about 0970 Ringerike, Akershus, Norway
died 1018

mother:
*Asta "Astrid" Gudbrandsdatter
born about 0970 Vestfold, Norway

siblings:
Gunhild Sigurdsdattir born about 1000 Ringerike, Norway
Guttorm Sigurdsson born about 1006 Ringerike, Norway died before 1047
Ingerid Sigurdsdattir born about 1012 Ringerike, Norway
*Harald III "Hardrada" "The Severe" Sigurdsson King of Norway
born about 1015 Ringerike, Buskerud, Norway
died 25 September 1066 Stamford Bridge, Yorkshire, England
buried Helgesaetter, Kloster, Trondheim, Norway

spouse:
unknown

children:
*Thorbiorg (Bergliot) Halfdansdottir
born about 1010 Osteraat, Yrje, Norway

biographical and/or anecdotal:

notes or source:
LDS
ancestry.com