Not sure if this helps, but in the DNZB essay on Te Hapuku (click here to see this) it says:
Te Hapuku may have joined in the campaign to punish Ngati Raukawa and its Rangitane allies for their attack on Hawke's Bay, in which the mother of Kurupo Te Moananui had been killed. It is recorded that he consumed part of the body of the son of Te Hirawanu Kaimokopuna. One of the prisoners taken was a female cousin of Te Hirawanu; Te Hapuku took her to wife; their son was Watene Te Hapuku.
Jamie
19 Sep 2008