10% of Galician DNA is North African, reigniting Celtic debate

Galicia and North African DNA: Why 10% Reignites the Celtic Debate

A piece of data has circulated for years in population genetics discussions without fading: Galicia supposedly holds the highest proportion of North African DNA in Western Europe. The most repeated figure is 10%, although depending on the calculator used, it can rise to 12%. This is not a settled academic thesis but a shifting landscape where genome databases, AI-generated estimates, and much misconstrued history coexist. What began as a discussion about skin tones and supposed legacies has turned into a debate about statistical methodology.

How Much North African DNA Is Actually in Galicia?

The number underpinning the entire discussion is that 10%. It appears repeatedly as the percentage of North African ancestry attributed to the Galician population, with some raising it to an average of 12%. Tables circulating on genetics calculators place it in a similar range. In Ourense, one available estimate lowers the Mozarab component to 5.8%, while Cantabria stands at 2.5% and Burgos at 2.9%.

The picture changes when looking south. The same tables place Huelva with 15.2% North African component, Seville with 12.4%, and Cadiz with 10.9%. This means the gradient some present as exclusive to the northwest is replicated, and more intensely, in the peninsular southwest. Western Andalusia surpasses Galicia in most counts, debunking the idea of a unique northwestern blend.

Were the Celts a Race or a Culture?

The most solid answer emerging from the discussion is unequivocal: the Celts were a collection of peoples and customs, not a racial group. Galicia is full of castros (hill forts), and no one disputes that. What is disputed is whether that material legacy implies a specific phenotype three thousand years later.

The underlying argument blends archaeology and history. The peninsula saw the passage of Romans, populations from the Maghreb, migrants from the Eastern Mediterranean, and later, converts. Attributing the face of a 5th-century BC Celt to today's Galicians is, at best, a leap of faith. The same standard applies to those who boast of purity in other territories.

Why Do Two Calculators Give Different Results for the Same Province?

Because the tools and samples are not the same. Some estimates are generated by asking an AI model to perform a calculation on provincial averages. Others come from open databases of historical and modern genomes. The problem, as enthusiasts themselves point out, is that many samples are small and the reference populations overlap.

A specific case: using French Basques as an Iberian reference to circumvent unwanted traces is, according to an analysis circulating in the same discussion, a debatable choice. The Mozarabs and Druze overlap, and Eastern Germans carry Slavic influence. Each methodological correction shifts the result, and with it, the political conclusion one wishes to draw.

Phenotype: The Slippery Slope

Skin tone, eye tonalidad, and hair are brought into the discussion as supposed genetic proof. Some argue that Galicia is actually one of the regions with the fairest skin, blond hair, and light eyes, the opposite of the initial thesis. And there are red-haired Galicians, with entire families of redheads, who share their experiences firsthand.

Phenotype, however, is a poor indicator of ancestry. Population genetics is not discernible at a glance, and those who argue otherwise end up debating photographs and anecdotes. No one has proven that a face is a laboratory examination.

The North African Component Predates the 711 Invasion

The most cited calculations distinguish between two different contributions: the North African proper and the Eastern Mediterranean. The most common hypothesis suggests that in Galicia and León, the North African trace is notable but the Semitic component is scarce, placing a significant part of this admixture before the year 711.

The distribution is not uniform. Someone from La Mancha would show more Semitic component and less North African; someone from Levante or the Balearic Islands, more Eastern Mediterranean. The distribution is ordered from west to east, and each province tells a different story. The complete data, with paternal lineage tables broken down region by region, is what no one summarizes in a single sentence.

With the available data, the only firm conclusion is that the North African gradient exists and is concentrated in the peninsular west, including Galicia. Beyond that, each calculator, each sample, and each methodological correction rewrites the result. The debate over whether Galicia is the most Celtic or the most North African region in Europe will not be resolved with a tonalidad map. It gets stuck precisely there: in deciding what question is actually being asked.