Modern genetic evidence, based on analysis of the Y chromosomes of men currently living in Britain, the Western Isles, Orkney, Shetland, Friesland, Denmark, North Germany, Ireland, Norway and the Basque Country, is "consistent with the presence of some indigenous component in all British regions". For the sake of this study samples from the Basque Country were considered indigenous (a putative paleolithic Y chromosome). These studies cannot significantly distinguish between Danish, Frisian and German (Schleswig-Holstein) Y chromosomes although the Frisians were slightly closer to the indigenous samples. Areas with the highest concentration of Germanic (Danish-Viking/Anglo-Saxon) Y chromosomes occurred in areas associated with the Danelaw and Danish-Viking settlement, especially York and Norfolk. In these areas, about 60% of Y chromosomes are of Germanic origin.