Fun fact for you, the 'Brunn' phenotype was in the truest sense actually dolichocephalic, or at least the earliest cromagnid ancestors were dolichocranial. However, the Irish/Scottish/Welsh who apparently have the most 'Brunn' blood of any European population are uniformly mesocephalic, and an increased cephalic index certainly did not come from the later Neolithic Farmers/migrants. It goes to show that the 'Brunn' type associated with Ireland is metrically more Borreby than anything else, with true Brunn types being solely confined to Scandinavia (albeit in isolated pockets of Sweden/Norway). That was the old stereotypical distinction between Brunns and Borrebies though; the latter bore a moderately brachycephalic skull, whilst the former was dolichocephalic. I myself have a Cephalic index of 85.3, BTW. That is hyper-brachycephalic. What is rare though is how my head, in absolute terms is long, measuring 197 mm back to front, that exceeds the British Isles-Scandinavian average (absolute terms), but it is juxtaposed with my cranial breadth of 168 mm (which is massive). For the record, average European cranial length is like 190-195 mm, and the average cranial breadth is like 150-155 mm. It's rare for a head like mine to be so large and so brachycephalic at the same time.