Nielsen Hayden genealogy
Harald Grenske
Abt 952 - Abt 995 (~ 43 years)-
Name Harald Grenske Birth Abt 952 [1] Gender Male Death Abt 995 [1, 2] Person ID I1228 Ancestry of PNH, TNH, and others Last Modified 9 Dec 2021
Family Asta Gudbrandsdottir Children + 1. St. Olaf II Haraldsson, King of Norway, b. Abt 995 d. 31 Aug 1030, Stiklestad, Verdal, Nord-Trøndelag, Norway 
(Age ~ 35 years)Family ID F584 Group Sheet | Family Chart Last Modified 23 Jan 2016
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Notes - Called "the Greenlander" but not from Greenland; he appears to have been from Grenland in Norway. Supposedly murdered by foster sister Sigrid Storrada. "Recent scholarship has questioned the historicity of Harald." [Wikipedia]
Todd A. Farmerie, 26 Apr 2016, post to soc.genealogy.medieval:
In Norway, probably no earlier than the father of St. Olaf (these genealogies appear to have been reworked to make the warlords who succeeded to Norway be descendants of Harald Fairhair).
- Called "the Greenlander" but not from Greenland; he appears to have been from Grenland in Norway. Supposedly murdered by foster sister Sigrid Storrada. "Recent scholarship has questioned the historicity of Harald." [Wikipedia]
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Sources - [S145] Ancestral Roots of Certain American Colonists Who Came to America Before 1700 by Frederick Lewis Weis and Walter Lee Sheppard, Jr. 8th edition, William R. Beall & Kaleen E. Beall, eds. Baltimore: Genealogical Publishing Company, 2004, 2006, 2008.
- [S49] Genealogics by Leo Van de Pas, continued by Ian Fettes and Leslie Mahler.
- [S145] Ancestral Roots of Certain American Colonists Who Came to America Before 1700 by Frederick Lewis Weis and Walter Lee Sheppard, Jr. 8th edition, William R. Beall & Kaleen E. Beall, eds. Baltimore: Genealogical Publishing Company, 2004, 2006, 2008.