For their presence to support an Isles origin for L21, one would have to demonstrate some sort of connection between them and L21, like a shared marker between P312 and L21.The Continent is the real matrix of P312 and its offspring and so is the likeliest place to look for the birthplace of L21.For France and Iberia to surpass the Isles in variance, even just a little, given the overwhelming numbe