The genetic snapshot from 15 individuals excavated at Eastern and Western Settlement loci provides a preliminary but revealing portrait. Y-chromosome lineages include I1 (3 samples), R (2), I (1), IJ (1), and CT (1), consistent with male-line ancestries commonly associated with Scandinavian and broader northwestern European populations. Mitochondrial DNA shows maternal haplogroups dominated by J (5), H (4), T (3), U (2), and K (1), haplogroups widespread across Norse and adjacent Atlantic communities.
These patterns suggest that the Greenland settlers bore a predominantly northwestern European genetic signature on both paternal and maternal lines. The relative predominance of I1 — a haplogroup strongly associated with Scandinavia — is concordant with archaeological attributions to Norse settlers. Maternal haplogroup diversity, with several J and H lineages, could imply women of similar north Atlantic origins or island networks (Iceland, the British Isles) participated in colonization.
Caveats are essential: the sample count is modest (n=15), and a small number of Y-lineages can exaggerate apparent patterns. Dating uncertainty for some early samples (e.g., the 8th-century dates) further complicates chronological assignment. Notably, the dataset shows no clear signal of Arctic-specific maternal haplogroups commonly found in contemporary Inuit populations — a point that may reflect limited admixture or sampling bias. Overall, the genetic data align with archaeological evidence for a mainly Norse-derived colonizing population, while underscoring the need for larger, stratified sampling to resolve questions of sex-biased migration and post-contact admixture.