Ngāi Tahu descend from Tahupōtiki, who was the younger brother of Porou-rangi, founding ancestor of Ngāti Porou, a tribe of the East Coast of the North Island.
Ngāi Tahu descend from Tahupōtiki, who was the son of Paikea. Tahupōtiki was also the uncle of Porou-rangi, founding ancestor of Ngāti Porou, a tribe of the East Coast of the North Island.