A significant incident in the history of Ngati Porou was the murder of Poroumata at Whareponga. Poroumata, a seventh generation grandson of Porourangi lived peacefully there as chief of Ngāti Ruanuku; it was his sons who caused the tragedy. They plundered the fishing nets of the common folk without his knowledge, and ultimately Poroumata and his sons were killed at sea by aggrieved members of Ngāti Ruanuku.
However, his three daughters Materoa, Tāwhipare and Te Ataakura survived. Sir Apirana Ngata ranks these women ‘amongst the most outstanding members of the Porourangi line who bred its greatest chiefs and most celebrated warriors.’ (ref: Porourangi School of Maori Culture, rauru-nui-a-toi course).