 The Māori name for Wellington Harbour, "Te Whanganui a Tara" (the great harbour of Tara), derives from Tara, a grandson of Kupe and ancestor of several local "iwi".Names from other islands visited during the Polynesian migrations have become attached to some New Zealand landmarks, for example Raratoka Island (from Rarotonga) and Tawhiti (from Tahiti).Whakatane, Rangitoto Island, Taupo, Urewera, Ngongotahā, and Tikitapu all commemorate incidents that occurred during the early arrivals, many of which are now forgotten.