Rung is the apical father of the great house at the centre of the Ot Ndrong. The epic's heroes, Tiăng and Lêng foremost among them, are named again and again by the patronymic formula kon Rung, 'the children of Rung', which fixes them within a single ancestral lineage. Rung himself acts little within the surviving episodes; his role is genealogical, anchoring the heroic generation within the wider descent that the cycle traces back to the ancestress Chép.