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Family:
Bibliography
  1. Cokayne, George Edward, Complete Peerage of England, Scotland, Ireland, Great Britain, and the United Kingdom, extant, extinct, or dormant, vol 10, Oakham-Richmond. London: St Catherine Press, 1945. Reprinted (4 per page) Gloucester: A Sutton, 1982. Available at https://familysearch.org/search/catalog/271412 Information from this source tagged as [Ref: CP X [Ap][p0-9].*].
  2. Tapsell, R. F., Monarchs, Rulers, Dynasties and Kingdoms of the World. New York: Facts on File Publications, 1983. Information from this source tagged as [Ref: Tapsell Dynasties p[0-9]*].

Sources for birth and parent Information
father:
[Ref: CP X AppA p4, Tapsell Dynasties p181]
Sources for death Information
date:
abt 893 [Ref: CP X AppA p4, Tapsell Dynasties p181]
Research Notes:
Jarl of Orkney c892-c893 [Ref: Tapsell Dynasties p181]



Pedigree of Guthorm Jarl Of Orkney
                            /-----Halfdan The Old
                   /-----Ivar Earl Of The Uplands
          /-----Estein Earl Of More
 /-----Sigurd I Jarl Of Orkney
Guthorm Jarl Of Orkney



Descendants of Guthorm Jarl Of Orkney
1. Guthorm Jarl Of Orkney