I have no Sardinian in my Population Finder and neither does my 2nd cousin D. McHaffie who is y-dna I2a2b, and my source for my long dead father's y-dna. My Pop Finder is about 95% W. Europe (including Orcadian) and 5% Eastern Europe. His Pop. Finder is about 96% Orcadian and 4% Mid-Eastern. I2a2b developed in Britain thousands of years ago with the earliest I2a being there right after the Ice Age and originally out of the area of Croatia. Sardinia's first people apparently were y I2a and would have come from Croatia. What has been exciting is that when I look at my cousins matches with me at GedMatch, our biggest matches on chromosomes when checked using Admixtures, Chromosome Painting, will have often Sardinian for that block, or be Northern Europe Sardianian in the color painting. Another interesting thing is that in my genealogy research, I found one American Indian ancestress, d. 1823, young, and though I seem to have no other American Indian ancestry, when I look at Admixtures Eurogenes K-36 and similar choices, there "she" is, a red stripe in several places throughout the chromosome painting, so her Whiting family, and her one child's Durkee kin will surely be showing up around those spots as I'm able to tell which of my matches fall at those spots. Mary Lou