Genetic Future has the temerity to put the shyest people in Europe on the spot, pointing to a paper, Genome-wide association analysis of metabolic traits in a birth cohort from a founder population. Below the fold is a map swiped from Genetic Future, I invite some bold if introverted readers to offer comment on the correspondences with their own knowledge of their nation.
Related:Finns as European outliers and The genetics of Fenno-Scandinavia.