Other names for Ragnhild were Hilda Countess More, Hiltrude and Raginhilde.
FamilySearch has b. abt 848, Orkney Islands, Scotland. May have been born earlier than that.
Ragnhild married Ragnvald Eysteinsson Earl of M°re, son of Eystein "Glumra" Ivarsson Jarl of Oppland and Aseda Rognvaldsdatter, about 867 in Maer, Nord-Trondelag, Norway. (Ragnvald Eysteinsson Earl of M°re was born about 830 in Maer, Oppland, (Norway), died in 890 in Orkney, Orkney Islands, Scotland and was buried in 893.)
1 Website - Genealogy, http://www.smokykin.com/ged/f002/f00/a0020083.htm.
2 Weis, Frederick Lewis and Walter Lee Sheppard, Jr; William R. Beall and Kaleen E. Beall, eds, Ancestral Roots of Certain American Colonists Who Came to America before 1700 (8th ed. Baltimore: Genealogical Publishing Company, 2008.), Line 121E-17 (Ragnvald I).