The historical record — the record of European contact and the introduction of trade goods into the region — provides additional constraints.

European contact with the Northwest Coast became regular in the late eighteenth century, with the fur trade establishing new networks of exchange that rapidly transformed the material culture of Indigenous peoples across the region.

If Kwäday Dän Ts’ìnchi’s iron tools were of European manufacture, he likely lived no earlier than the mid to late eighteenth century.

If they were of pre-contact trade iron, he could have lived at any point within the broader estimated range.

The most defensible current understanding places Kwäday Dän Ts’ìnchi as having died sometime in the past approximately 300 to 550 years — a range that spans from roughly the mid-fifteenth to the early eighteenth century.