Question: What is the date of death of Rǫgnvaldr Óláfsson (Fl. 1164)'s father?
Sentence (from "Óláfr Guðrøðarson (died 1153)"): Óláfr Guðrøðarson (died 29 June 1153) was a twelfth-century King of the Isles.
Relevant evidence: Yes