A · A1 · A1b · A1b1 · BT · CT · CF · F · G · G2 · G2a · G2a2 · G2a2b · G2a2b1 · G2a2b1a · G2a2b1a25

Haplogroup G2a2b1a25

G-Y276551

Macro-haplogroup

Parent clade

G2a2b1a

Formed (estimate)

approximately 7,200 to 8,200 years before present

TMRCA (estimate)

approximately 1,400 to 1,900 years ago

Y276551
Y276569
Y276580
additional WGS markers found primarily among Aegean and southern Balkan lineages

Overview

G-Y276551 is a regional Aegean–southern Balkan lineage representing a historically mobile yet geographically compact demographic trajectory. Its formation aligns with early Bronze Age Anatolian ancestry entering the Aegean basin, though the lineage’s main expansion occurred much later, during classical, Roman and early Byzantine periods. The lineage’s structure reflects maritime interactions and localized founder effects tied to coastal communities, islands and nearby inland basins.

Geographic distribution

Modern distribution centers on Greece, the Aegean islands, western Turkey and the southern Balkans. Smaller but significant occurrences appear in Albania, North Macedonia and southern Italy. It is rarely detected outside the Mediterranean sphere.

Ancient DNA

Classical period burials in the Aegean islands show upstream markers associated with Y276551’s ancestral phase.
Late Roman individuals from Macedonia and Thrace show partial SNP affinities matching this branch.
Early Byzantine samples from the northern Aegean reveal STR frameworks consistent with downstream Y276551 microclades.

Phylogeny & subclades

The lineage forms a two-part internal structure: an Aegean-centered cluster and a southern Balkan branch. Divergence within the lineage fits a historical timeframe of coastal-focused movement and localized settlement stability.

G-Y276551* core Aegean clade
G-Y276551a southern Balkan lineage
G-Y276551b western Anatolia derived microbranch
rare Italian coastal cluster

Notes & context