In Italy's heel, a Greek language survived—but the community did not stay genetically isolated.

Grecìa Salentina is a group of towns in southern Puglia where Griko, a Greek dialect, has historically been spoken. Were their people mainly descended from ancient Greek settlers, later Byzantine arrivals, or a more complicated history?

A new preprint studies 27 local genomes alongside comparison samples, including 4,021 ancient individuals. Its main result: the community's overall genetic profile broadly matches neighboring Southern Italians.

Some tests do pick up slightly stronger connections to Greece and Anatolia. In one comparison, the samples overlap especially with Sicily and the southeastern Peloponnese. Among Byzantine-era references, western Anatolian groups show some overlap too. These are genetic similarities, not proof of one exact homeland.

The deeper story has many layers: ancestry shaped by early farming and Bronze Age movements, followed by further Mediterranean connections. Ancient comparisons fit a history more complex than descent from one group of colonists. The study cannot put a reliable percentage on ancestry specifically from ancient Greek colonization or Byzantine immigration.

Within Grecìa Salentina, DNA sharing connects different towns. The samples show no excess genetic signs of isolation compared with other Italians. Greek-speaking communities exchanged ancestry with the wider region.

The authors favor a language maintained locally and periodically reinforced by arrivals from the Greek-speaking world. That could preserve a distinctive language without creating a separate genetic island.

This is a small-sample preprint, not yet peer-reviewed. DNA supports patterns of contact; it cannot prove when Griko first arrived or which language a particular ancestor spoke.

📚 Source: Cangialosi et al. (2026), bioRxiv (preprint)
Layered genomic composition and linguistic continuity in Grecìa Salentina

🧬 Curious about your own ancestry?
🌍 Explore your DNA at https://www.worldgenetics.app/