And is it possible to narrow down what migration this came from? If it helps my family can be traced back to East Anglia/Suffolk for hundreds and hundreds of years. I am aware this territory was under Danelaw for around 100 when the Vikings raids took place. But also the Saxons were from southern Scandinavia.
Secondly I’d love the hear from anybody else British who has a significant amount of Scandinavian DNA. I believe any Germanic DNA we have likely can from Celtic migrations? Not sure. Interested in British genetics!
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This info. is from an older Wired magazine interview, but it may not be entirely debunked yet:
It was shown that people in Norway, Sweden and Denmark are all, genetically, very distinct. Picking out Norway as an example, the genetic similarities to mainland Britain were very slim. However, comparing the data to participants from the Orkney Islands showed that about a quarter of their DNA shared similarities with Norway.
Given that Orkney was part of Norway in the ninth century, it looks like there has not been a great deal of diversity on the islands.
Similarly, about half the DNA of participants from the south-east exhibited a prevalent Anglo-Saxon and Viking influence -- participants in these locations shared DNA with groups from Belgium, Germany and Denmark where these distant ancestors originated.
Wales, by comparison, presented very few interferences from migrant groups. Here, the DNA had similarities with what Donnelly referred to as the Irish compound. Remnants of the Irish and French DNA are considered to be ancient DNA because they are present in all groups in Britain. However in Wales, these markers were substantially more common, suggesting people from Wales may have some of the most ancient DNA in Britain.
Another up-&-coming DNA test company, My True Ancestry tries to match your DNA with ancient samples. While I have not seen professional validations of the company yet, their attempts at using real anthropological samples from burial sites sounds promising and a good check against companies with nebulous sample sources. Their website is also frequently updated with charts, graphs and other features that can be fun to play around with. I am just not certain if the matching is wholly accurate yet (I matched Birka Shield maiden later but not originally), but I qualify that I am a lay-person with no formal genetic training.