3/4 of the population of East Yorkshire have Viking Heritage. The rest have Picts/Scots genes. Hadrian had the right idea, but he forgot the North Sea access. No wonder wellies are still a big seller.
Norðimbraland er kallat fimmtungr Englands, ok er þat norðast, næst Skotlandi fyrir austan. Þat hǫfðu haft at fornu Danakonungar. Jórvík er þar hǫfuðstaðr. Þat ríki átti Aðalsteinn ok hafði sett yfir jarla tvá. Hét annarr Álfgeirr, en annarr Goðrekr. Þeir sátu þar til landvarnar bæði fyrir ágangi Skota ok Dana eða Norðmanna, er mjǫk herjuðu á landit ok þóttust eiga tilkall mikit þar til lands, því at á Norðimbralandi váru þeir einir menn, ef nǫkkut var til, at danska ætt átti at faðerni eða móðerni, en margir hvárirtveggju. "Northumbria was reckoned a fifth part of England; it was the northernmost county, marching with Scotland on the eastern side of the island. Formerly the Danish kings had held it. Its chief town is York. It was in Athelstan's dominions; he had set over it two earls, the one named Alfgeir, the other Gudrek. They were set there as defenders of the land against the inroads of Scots, Danes, and Norsemen, who harried the land much, and though they had a strong claim on the land there, because in Northumbria nearly all the inhabitants were Danish by the father's or mother's side, and many by both." - Egill's Saga, chapter 51