A focused population profile of Castilians from Castile and Leon, their northwestern Iberian background, closest modern genetic matches, ancestry model, and World Genetics G25 heatmap.
📍 RegionCastile and Leon, northwestern Spain
🗣️ LanguageSpanish / Castilian
🧬 Closest matchSpanish Galicia (Galician)
Who are Castilians from Castile and Leon?
Castilians from Castile and Leon come from a large northwestern Spanish region including provinces such as Leon, Burgos, Valladolid, Salamanca, Zamora, Palencia, Segovia, Soria, and Avila. The region is central to medieval Castile, the Leonese kingdom, the Reconquista frontier, rural Meseta communities, and the development of the Spanish language.
Spanish, historically Castilian, is the main language. Leonese and other regional speech traditions are part of the broader historical landscape, especially in the west of the region.
As a genetic reference, Spanish Castile and Leon Castilian is useful for comparison with Galician, Portuguese, Andalusian, Extremaduran, Castilla-La Mancha, Murcian, Valencian Alicante, Azorean Portuguese, and other western Iberian references.
What is Castile and Leon DNA closest to?
In the World Genetics modern G25 table, Spanish Castile and Leon Castilian is closest to Spanish Galicia Galician, Portuguese, Spanish Andalusia Andalusian, Spanish Murcia Murcian, Spanish Castile and Leon Leon Castilian, Spanish Castilla-La Mancha Castilian, Spanish Extremadura Extremaduran, Spanish Valencia Alicante Valencian, Portuguese Azores, and Spanish Baleares Ibiza Catalan. The result places Castile and Leon in a western Iberian cluster with Galicia and Portugal especially close.
Closest Matches
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Population
Distance
What does Castile and Leon ancestry look like?
The ancestry breakdown gives deeper component proportions, while closest matches show modern similarity. Castile and Leon is best interpreted as a western/northwestern Iberian Castilian profile, with Galician, Portuguese, Andalusian, Extremaduran, and nearby Castilian references.
Ancestral Breakdown
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Where is Castile and Leon DNA closest on the map?
The heatmap should emphasize Castile and Leon, Galicia, Portugal, Extremadura, Castilla-La Mancha, Andalusia, Murcia, Valencia, and the western Iberian Peninsula.
Spanish Castile and Leon (Castilian) Genetic Distance HeatmapWarmer areas show closer modern population averages.
