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Theories on Spanish Origins of the original Peoples of the British Isles
Atlantic Seaway Theory
Some archaeologists propose that during the Mesolithic and Neolithic periods, populations migrated along the Atlantic seaways from Iberia up to Brittany, Ireland, and Britain.
Maritime travel and coastal navigation would have facilitated the movement of people, culture, and technologies such as farming and megalithic building traditions.
Genetic Evidence (Iberian Connection)
Modern DNA studies suggest that a significant portion of the genetic ancestry of the British Isles comes from early farmers originating in the Near East, who migrated westward into Iberia and then north to Britain.
This implies that Britain’s Neolithic farmers may have arrived via Iberia and Atlantic France, rather than directly across mainland Europe.
Megalithic Culture Hypothesis
The construction of megalithic monuments (e.g., passage tombs, stone circles) in Britain and Ireland is often compared to those in Iberia.
Some scholars argue that these cultural similarities reflect not just diffusion of ideas, but also movement of people from Iberia to the British Isles around 4000–3000 BCE.
Celtic Connections
In the Iron Age, the spread of Celtic languages and culture is debated.
While the traditional model sees Celtic culture moving from Central Europe (Hallstatt/La Tène), another school of thought argues for an “Atlantic Celtic” origin, where Celtic language and culture developed along the western seaboard (Iberia, France, Britain, Ireland).
Ancient authors like Strabo and Avienus even mentioned connections between Celtic peoples of Iberia and those of Britain and Ireland.
Later Iberian Links
Some theories suggest contacts during the Bronze Age through trade in metals (tin from Cornwall, gold and silver from Iberia).
These exchanges may have strengthened genetic and cultural ties between Iberian and British populations.