Question: What is the date of death of Rǫgnvaldr Óláfsson (Fl. 1164)'s father?
Sentence (from "Óláfr Guðrøðarson (died 1153)"): Nevertheless, before Guðrøðr returned to the Isles, three sons of Haraldr confronted Óláfr, and demanded a share of the kingdom before slaying him.
Relevant evidence: No