Haplogroup R-DF27 (R1b, Iberian)
R-DF27 is the Iberian wing of R1b — the majority paternal lineage of Spain and Portugal, expanded there after the Beaker-era turnover. Explore the branch in the full Y-DNA haplotree — sub-branches, defining variants and where its testers live. Free, no account needed.
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Origin and distribution of R-DF27 (R1b, Iberian)
R-DF27 is the branch of R-M269 that made Iberia its home: the single most common paternal lineage in Spain and Portugal, where it accounts for the majority of the peninsula's dense R1b, with a second stronghold across southwestern France. It descends from the same Beaker-era expansion that reshaped all of Western Europe's paternal lines around 2500 BCE — the turnover Iberian ancient DNA records with particular clarity, as nearly the whole earlier Y-chromosome pool gave way within centuries.
Its best-known sub-branch, R-M167 (SRY2627), has been studied since the earliest days of Y genetics for its concentration in Catalonia, Valencia and across the Pyrenees into Gascony — a young, sharp founder cluster inside the broader Iberian sweep. Basque paternal lines, famously, are mostly DF27 as well: the language is pre-Indo-European, the paternal gene pool is Beaker-descended — the standing proof that languages and lineages keep separate books.
One line among many: your Y haplogroup traces a single paternal line — one ancestor per generation out of thousands — so it is a thread of deep ancestry, not an ethnicity and not a percentage of who you are. Two men in the same branch share a forefather, but the rest of their genomes can differ as much as any two strangers'.
Frequently asked questions
What is haplogroup R-DF27 (R1b, Iberian)?
R-DF27 is the Iberian wing of R1b — the majority paternal lineage of Spain and Portugal, expanded there after the Beaker-era turnover. It is a branch of the Y-DNA tree: everyone in it inherits the same set of defining mutations from one shared forefather.
How do I find out if I belong to R-DF27 (R1b, Iberian)?
If you have already tested with a consumer DNA company, the free Y-DNA Clade Finder reads a raw DNA export (23andMe, AncestryDNA, MyHeritage or a VCF) and places you on the tree at the resolution your file supports — free, and the file is discarded after analysis. A dedicated Y-DNA sequencing test resolves deeper branches than a genotyping chip can.
Does belonging to R-DF27 (R1b, Iberian) make me descend from one people?
No. A haplogroup follows a single paternal line — one ancestor per generation — while the rest of your ancestry doubles every generation back. It is a deep-time thread, not an ethnicity, and two members of the same branch can otherwise be as genetically different as any two strangers.
What does this page's tree data show?
The live browser below shows the branch inside the full Y-DNA haplotree of tested lineages — its sub-branches, the variants that define them, and the countries its testers report. Counts reflect people who have taken a Y-DNA test and shared an origin, so they describe the tested world, not ancient frequencies.
Keep exploring
Don't know your haplogroup yet? The free Y-DNA Clade Finder reads it from a raw DNA export. Or browse the whole tree in the Y-DNA Haplotree. Other major branches: