Southeast England was 80% replaced by Anglo-Saxons in the Early Middle Ages

[Creoda]

But over time native Britons (mostly via women) were assimilated into Anglo-Saxon culture.

Abstract from a new study coming.
https://www.e-a-a.org/EAA2020virtual...gram=2#Program

THE ANGLO-SAXON MIGRATION AND FORMATION OF THE EARLY ENGLISH GENE POOL
Abstract author(s): Gretzinger, Joscha (Max Planck Institute for the Science of Human History) - Altena, Eveline (Leiden Uni-versity Medical Center, University of Leiden) - Papac, Luka (Max Planck Institute for the Science of Human History) - Krause, Johannes (Max Planck Institute for the Science of Human History; Faculty of Biosciences, University of Jena) - Sayer, Duncan (School of Forensic and Applied Sciences, University of Central Lancashire) - Schiffels, Stephan (Max Planck Institute for the Science of Human History)
A series of migrations and accompanied cultural changes has formed the peoples of Britain and still represents the foundations of the English national identity. For the most prominent of these, the Anglo-Saxon migration, the traditional view, resting upon historical sources and derived concepts of ethnic and national origins from the 19th century, outlined that the indigenous Romanised British population was forcibly replaced by invading Germanic tribes, starting in the 5th century AD. However, to which extent this historic event coincided with factual immigration that affected the genetic composition of the British population was focus of generations of scientific and social controversy. To better understand this key period, we have so far generated genome-wide sequences from 80 individuals from eight cemeteries in East and South England. We combined this data with previously published genome-wide data to a total dataset of more than 200 ancient British genomes spanning from the Early Bronze Age to the Early Middle Ages, allowing us to investigate shifts and affinities in British fine-scale population structure during this phase of transformation. Here we present two preliminary results: First, we detect a substantial increase in continental Northern European ancestry akin to the extant Danish and Northern German populations during the Early Anglo-Saxon period, replacing approximately 80% of the indigenous British ancestry during that time period. Second, we nevertheless highlight the continuous presence of ancestry identified in Pre-Saxon Iron Age and Roman individuals during the Early and Middle Anglo-Saxon period, originating in the Early British Bronze Age and closely resembling present-day Celtic-speaking populations from Ireland and Scotland. Therefore, our study suggests that the early English population was the outcome of long-term ethnogenetic processes in which the acculturation and assimilation of native Britons into the immigrating Anglo-Saxon society played a key role.

Hence the dearth of Celtic culture in England from early on. A mass replacement event explains that.

[Lucas]

But over time native Britons (mostly via women) were assimilated into Anglo-Saxon culture.

Abstract from a new study coming.
https://www.e-a-a.org/EAA2020virtual...gram=2#Program

Hence the dearth of Celtic culture in England from early on. A mass replacement event explains that.

In short it is based on ancient genetics or other sources?

[Ruggery]

Did they kill all the Celts?

[Graham]

Perhaps it could be in line with England ruled by a foreign hierarchy that continued through to the Normans. With poorer Britons living out of town.


Who knows, headaches. Will read when it comes out.

[Rocinante]

Did they kill all the Celts?

I think most of them moved westward, and some of them went to Ireland, Brittany and Gallaecia.

[celticdragongod]

Did they kill all the Celts?

Most of the Celtic men.

[Davystayn]

Some of the britons moved (more likely the elites) we know some went to brittany for this reason, but also stayed and integrated with the new settlers.

It was likely highly regional, with some areas differing from another in terms of levels of settlement and acculturation.

The 19th century idea of lock stock mass displacement was always untenable but this study certainly shows there was indeed a great level of settlement, so confirms the written story, burials, place name evidence.

It wasn't just men who settled either, later women and would have come too, as confirmed in burials, numbers wise just logically lessens when you get further west, topography changes and so on

[Ruggery]

Most of the Celtic men.

And not woman and childrens?

[Creoda]

Most of the Celtic men.

Unknowable, and I doubt it.

Southeast/East England had been very Romanised too. I'll be surprised if the Britons the Anglo-Saxons mixed with were exactly like modern Irish/Scots.

[Creoda]

Some of the britons moved (more likely the elites) we know some went to brittany for this reason, but also stayed and integrated with the new settlers.

It was likely highly regional, with some areas differing from another in terms of levels of settlement and acculturation.

The 19th century idea of lock stock mass displacement was always untenable but this study certainly shows there was indeed a great level of settlement, so confirms the written story, burials, place name evidence.

It wasn't just men who settled either, later women and would have come too, as confirmed in burials, numbers wise just logically lessens when you get further west, topography changes and so on

Still, most of England is genetically pretty similar and clusters together as per the POBI to this day, the regional differences aren't that pronounced until you reach Devon, the Welsh border counties, and the Northeast/Cumbria (and what was Elmet). So I've been of the view this mix mostly happened in the Southeast/East Anglia in the 5th/6th centuries and then gradually replaced and drove out the Britons in other areas except those I mentioned.