Fifty-two ancient genomes from this Arawak-associated dataset span 800 BCE to 1650 CE and originate from Cuba, St. Lucia, Guadeloupe, Venezuela, Curaçao and the Bahamas. The paternal lineages are dominated by Y-chromosome haplogroup Q (26 individuals), with a small subset assigned to Q1b (2 individuals). Maternal lineages show a mix of Native American founding haplogroups: mtDNA C (14), D1 (10), B2j (6), A2 (5) and C1b (4).
These patterns align with broader expectations for Indigenous American groups: haplogroup Q is a common paternal lineage among many Native American populations, while A2, B2, C and D1 are typical matrilineal markers tracing back to the initial peopling of the Americas. The distribution of haplogroups across islands and time suggests a degree of continuity between mainland source populations (notably northern South America) and island communities, consistent with archaeological models of Orinoco-to-Caribbean dispersals.
Caveats: although 52 samples provide meaningful resolution, sampling is uneven in time and space. Temporal span across more than two millennia means later samples (post-contact centuries) could reflect demographic shifts, including contact-era admixture, which must be evaluated with genome-wide autosomal data. Some sites contribute only a few genomes, so site-level inferences remain tentative. Combined archaeological context and ancient DNA, however, strengthen the inference of long-standing indigenous ancestry in these islands and illuminate patterns of regional connectivity and local differentiation.