My Mother was born in Norway and as far as I can determine back into the 1700s has Norwegian and Swedish ancestors. My father born here had Italian parents. My results show 45% British, 31% European Jewish, 21% Scandinavian with uncertain of 1%. Most of the matches that I have checked under British Isles (and there is only 1 4th cousin) have overlap in Norway only with most of the rest Norway or Italy. Under European Jewish only 1 match with common Italian As a retired software engineer with 30 years experience half of which was in software testing I believe your algorithm and testing needs refinement.