 It is a primary branch of Haplogroup I-M170 (I*).The haplogroup reaches its peak frequencies in Sweden (52 percent of males in Västra Götaland County) and western Finland (more than 50 percent in Satakunta province).In terms of national averages, I-M253 is found in 35–38 per cent of Swedish males, 32.8% of Danish males, about 31.5% of Norwegian males, and about 28% of Finnish males.