Lineage & Ancestry of HRH Prince Charles, Prince of Wales @ Vol I p 56, s of Bjorn Bearsson & brother of Sybil who m Duncan K of Scotland
The cited information was published by Skilton, Edinburgh, Scotland, 1977 (Ref: Vol I p 56, s of Bjorn Bearsson & brother of Sybil who m Duncan K of Scotland) The author/originator was Gerald Paget.