when did maori establish kaiapoi pa? 1700

The background to the establishment of this pa was one of the many southward migrations of Maori times. This time it was Ngai Tahu moving into North Canterbury in the 1670 s displacing the established Ngati Mamoe as they went

why is the kaiapoi shorten their name? The town developed in the 1850 s on Kaiapoi Island, between the south and north branches of the Waimakariri River

The pa was built about 1700 by tu  Rakauatahi  the ngai of the tahu chief