Overview
J1-Y7552 is a downstream derivative of the Arabian-rooted J1-P58 expansion and likely arose among pastoralist groups inhabiting northern and central Arabia during the early Bronze Age. These populations navigated desert-steppe ecologies centered on wells, seasonally active wadis and oasis clusters that supported predictable grazing cycles. Their demographic structures correspond closely to the early formation of North Arabian tribal identities. During the Bronze and Iron Ages, Y7552-bearing groups took part in expansions across the Hejaz, Wadi Sirhan and the arid frontier zones of southern Jordan and western Iraq. The internal structure displays multiple founder-driven segments associated with regional clan traditions. In the early Islamic period, downstream offshoots migrated into Iraq and eastern Arabia, where new microbranches formed under conditions of settlement growth, trade intensification and tribal integration.