Nielsen Hayden genealogy
Family: Sigurd II Digri / Donada (F2547)
m. Aft 1004-
Male
Sigurd II Digri
Birth Death 23 Apr 1014 Clontarf, Dublin, Ireland 
Burial Marriage Aft 1004 [1] Father Mother
Female
Donada
Birth Death Burial Father Malcolm II, King of Scotland (Alba) | F5248 Group Sheet Mother
Male
Þorfinnr Sigurðarson
Birth Abt 1009 Death Abt 1056 Burial Spouse Ingibjorg Finnsdottir | F2534 Marriage
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Sources - [S128] The Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, Extant, Extinct or Dormant ed. Vicary Gibbs, H. A. Doubleday, Duncan Warrand, Howard de Walden, Geoffrey H. White and R. S. Lea. 2nd edition. 14 volumes (1-13, but volume 12 spanned two books), London, The St. Catherine Press, 1910-1959. Volume 14, "Addenda & Corrigenda," ed. Peter W. Hammond, Gloucestershire, Sutton Publishing, 1998.
- [S128] The Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, Extant, Extinct or Dormant ed. Vicary Gibbs, H. A. Doubleday, Duncan Warrand, Howard de Walden, Geoffrey H. White and R. S. Lea. 2nd edition. 14 volumes (1-13, but volume 12 spanned two books), London, The St. Catherine Press, 1910-1959. Volume 14, "Addenda & Corrigenda," ed. Peter W. Hammond, Gloucestershire, Sutton Publishing, 1998.