Facebook post by University of Helsinki

At the end of the Iron Age, Finland was inhabited by separate and differing populations, all of them influencing the gene pool of modern Finns. Researchers posit that the differences found in the Iron Age populations of western and eastern Finland are opposite to those found in today’s Finns.
Early DNA lineages shed light on the diverse origins of the contemporary population | University of Helsinki helsinki.fi

In the study, genes were investigated from archaeological bone samples of more than one hundred individuals who lived between the 4th and 19th centuries.