Te Rauparaha was the son of Werawera, of Ngati Toa, and his second wife, Parekowhatu (Parekohatu), of Ngati Raukawa. He is said to have been a boy when Captain James Cook was in New Zealand. If so, it is likely that he was born in the 1760s. He was born either at Kawhia or at his mother's home, Maungatautari. He was descended from Hoturoa of the Tainui canoe; both his parents were descended from the founding ancestors of their tribes. Although not of the highest rank, he rose to the leadership of Ngati Toa because of his aggressive defence of his tribe's interests and his skill in battle.