Shadows of Al‑Andalus

The electrified towns and fortress-ruins of medieval Spain—Palau Castell de Betxí, Plaza Parroquial in Vinaròs, Carrer Sagunto in Valencia, and the dense lanes around Calle Panaderos in Granada—preserve traces of a vibrant, cosmopolitan era. Archaeological layers from the Islamic period in Iberia (commonly referred to as Al‑Andalus) show continuity of urban life after the 8th-century conquest and through the later medieval centuries. Material culture—ceramics, coins, architectural fragments—indicates sustained trade and cultural connections across the western Mediterranean.

Genetic data from 11 individuals dated between 899 and 1300 CE illuminate threads of that connectivity. The presence of Y haplogroups E and J is consistent with known North African and Near Eastern male lineages historically present in the region. Simultaneously, common maternal lineages (mtDNA H and U) align with long-standing Iberian mitochondrial diversity. Archaeological evidence therefore matches a plausible scenario of incoming male-mediated gene flow layered onto a largely local maternal substrate.

Limited evidence suggests diverse social origins for the sampled individuals—urban dwellers and possibly frontier or military-associated people—but the sample size and uneven site coverage mean these interpretations remain tentative. Archaeological context matters: whether a bone came from a household, a cemetery, or a fortress alters how we read movement, marriage, and identity.

Eleven individuals provide a moderate dataset for exploring genetic dynamics in Islamic-period Spain. Observed Y-DNA haplogroups include E (3 individuals), J (2), CT (2), and R (1); mtDNA haplogroups are dominated by H (4), U (3), with HV, H3, and H1 also present. These patterns suggest asymmetric ancestry: several male lineages trace to components common in North Africa and the Near East (E and J), while the maternal portfolio is largely composed of haplogroups widespread in Europe and Iberia (H, U).

Interpreting these signals requires caution. Haplogroup E in Iberia can reflect North African ancestry but also local lineages with complex histories; J is often linked to Near Eastern gene flow but appears in many Mediterranean contexts. The designation CT is broadly defined and can include diverse descendant clades; without high-resolution SNP data its interpretation is limited. Likewise, mtDNA H and U are common across Europe and do not by themselves indicate recent migration.

Archaeogenetic context: the mix of male-biased E/J lineages with local maternal lineages fits models of male-driven mobility during medieval trade, conquest, and settlement. However, the sample size (11) and uneven geographic spread mean conclusions are provisional. Additional genomes, linked to secure archaeological contexts and higher-resolution Y/mtDNA clade assignment, are needed to refine these patterns.