“Everything you know about British and Irish ancestry is wrong. Our ancestors were Basques, not Celts. The Celts were not wiped out by the Anglo-Saxons, in fact neither had much impact on the genetic stock of these islands.”
So claims Stephen Oppenheimer based on genetic (DNA) research. An excerpt:
Everyone has heard of Celts, Anglo-Saxons and Vikings. And most of us are familiar with the idea that the English are descended from Anglo-Saxons, who invaded eastern England after the Romans left, while most of the people in the rest of the British Isles derive from indigenous Celtic ancestors with a sprinkling of Viking blood around the fringes.
Yet there is no agreement among historians or archaeologists on the meaning of the words “Celtic” or “Anglo-Saxon.” What is more, new evidence from genetic analysis — indicates that the Anglo-Saxons and Celts, to the extent that they can be defined genetically, were both small immigrant minorities. Neither group had much more impact on the British Isles gene pool than the Vikings, the Normans or, indeed, immigrants of the past 50 years.
The genetic evidence shows that three quarters of our ancestors came to this corner of Europe as hunter-gatherers, between 15,000 and 7,500 years ago, after the melting of the ice caps but before the land broke away from the mainland and divided into islands.
According to Oppenheimer, being the furthest west (furthest from Europe), only 12% of Irish have genetic material resulting from any immigration since the original hunter-gatherer settlement after the ice age.