Roman Spain: Granada to Empúries

The human story captured at Roman-period sites in Spain unfolds at the meeting point of local Iberian traditions and wide-ranging Mediterranean currents. Archaeological excavation at Paseíllos universitarios–Fuentenueva and Plaza Einstein (Granada), Mas Gassol–Alcover (Tarragona) and the necropolis at Empúries (Girona) provides funerary contexts dated between 44 BCE and 676 CE. These dates bracket the late Republic, the Imperial zenith, and the turbulent early medieval centuries. Material culture—grave goods, ceramics, and urban stratigraphy—shows layers of continuity from pre-Roman Iberian lifeways into an era of Roman institutions and trade.

Genetically, the assemblage of 19 samples suggests a complex origin story. The presence of Y-chromosome haplogroup R in multiple individuals is consistent with broader Western European lineages that were frequent in post-Bronze Age populations; haplogroup J appears in a minority, often linked elsewhere with eastern Mediterranean and Near Eastern ancestries. Small counts of E, L and T hint at additional Mediterranean and long-distance connections, but must be interpreted cautiously. Archaeological data indicates active ports at Empúries and integrated road networks that would have facilitated movement of people and genes across the Mediterranean.

Limited evidence suggests that the population profile of Roman Spain was not monolithic: local continuity combined with episodic influxes of people—soldiers, merchants, and migrants—left a patchwork of cultural and biological signals. Ongoing sampling and better temporal resolution are needed to resolve timing and directionality of those movements.

Ancient DNA from 19 newly reported individuals provides a snapshot of genetic variation in Roman-period Spain. Y-chromosome data show diversity: haplogroup R appears in four males, J in three, and single occurrences of E, L and T. Mitochondrial lineages are dominated by western Mediterranean-associated haplogroups H (4), K (4), T (3), U (3) and HV (2). These mitochondrial profiles align with continuity of maternal lineages common across Europe and the Mediterranean.

Interpreting Y-chromosome signals requires caution. Haplogroup R encompasses multiple subclades; in Western Europe R-derived lineages were widespread after the Bronze Age, suggesting continuity or assimilation of groups long present in Iberia. Haplogroup J's presence in three individuals can reflect gene flow from the eastern Mediterranean or Near East, consistent with documented maritime connections and veteran movements during the Empire. Single occurrences of E, L and T—each uncommon locally—point toward episodic long-distance mobility, such as sailors, merchants, or migrants, but their low counts (1 each) make such inferences preliminary.

Overall, the genetic picture is one of layered ancestry: a strong baseline of western Mediterranean maternal lineages with paternal diversity that records both local continuity and Mediterranean connectivity. With 19 samples, population-level claims are provisional; expanding the dataset and combining genome-wide analyses, isotopes, and precise archaeological provenience will clarify migration timing, sex-biased mobility, and social dynamics.