Overview
J1-ZS2367 is a downstream branch of the Arabian-rooted J1-L147.1 cluster and formed among pastoral groups inhabiting the northern Arabian desert during the early Bronze Age. These populations followed desert mobility systems dependent on wells, sparse wadis and grazing microzones that shaped early Semitic-speaking tribal development across the Hejaz and central Arabia. Throughout the Bronze and Iron Ages, ZS2367-bearing lineages expanded across the Hejaz, Najd and the western Mesopotamian frontier. Downstream structure reveals several founder events associated with persistent clan-level demographic segmentation. During the early Islamic period, additional migration into Iraq and eastern Arabia produced localized microclades shaped by settlement growth and tribal integration.