A focused population profile of the Cornish, their southwestern British background, closest modern genetic matches, ancestry model, and World Genetics G25 heatmap.
The Cornish are the people of Cornwall in southwestern Britain, with a regional identity tied to the peninsula, mining communities, fishing ports, Atlantic trade, and diaspora communities in places such as Australia, North America, and South Africa. Cornish history is connected to Brittonic-speaking Britain, medieval Cornwall, maritime networks, and later industrial migration.
English is the main language today, while Cornish is a revived Celtic language and an important symbol of Cornish identity. The Cornish reference should be read as a southwestern British profile rather than as a broad English average.
As a genetic reference, Cornish is useful for comparison with Welsh, English, Manx, Breton, Scottish, Irish, Dutch, and other Atlantic northwest European populations.
In the World Genetics modern G25 comparison, the closest non-self match for Cornish is Welsh. Other nearby references include Anglo-Canadian Newfoundland and Labrador, Anglo-Australian, Manx, and English. This gives the Cornish profile its nearest modern genetic context inside the current reference database.
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The ancestry breakdown gives deeper component proportions, while closest matches show modern similarity. Cornish is best interpreted as a southwestern British and Atlantic profile, with Welsh, English, Manx, Breton, and Scottish references nearby.
The heatmap should emphasize Cornwall, Wales, England, the Isle of Man, Brittany, Scotland, and nearby Atlantic northwest European references.
The closest non-self match in this World Genetics comparison is Welsh. Other nearby references include Anglo-Canadian Newfoundland and Labrador, Anglo-Australian, Manx, and English.
In the current modern G25 reference set, Welsh is the closest listed match to the Cornish average after removing Cornish itself from the table.
The heatmap shows where modern reference populations are closer or farther from the Cornish G25 average, giving the closest-match results a geographic view.
