Question: What is the date of death of Rǫgnvaldr Óláfsson (Fl. 1164)'s father?
Sentence (from "Óláfr Guðrøðarson (died 1153)"): Whilst this strengthened Norwegian links with the Isles, it secured the ecclesiastical independence of Óláfr's domain, and safeguard his secular authority in the region.
Relevant evidence: No