Overview
J1-ZS1741 is a downstream member of the Arabian-rooted J1-L147.1 expansion and originated among early pastoralist groups occupying northern Arabia and the Hejaz during the late Neolithic and early Bronze Age. These ancestral populations relied on desert wells, ephemeral streams and predictable grazing zones, enabling a mobile pastoral lifestyle. Their demographic structure parallels the early social formations that contributed to the rise of Semitic-speaking tribes. During the Bronze and Iron Ages, ZS1741-bearing groups participated in regional expansions that integrated the Hejaz, Najd and the western Mesopotamian frontier. Founder-driven structuring within its downstream branches reflects enduring clan identities. With the expansion of the early Islamic world, certain subclades moved eastward into Iraq and the Gulf region, where additional microbranches developed.