Ko Ngāti Tangatakau tētahi o ngā hapū o Rangitāne. Whakapapa ai te iwi o Rangitāne i a Whātonga, te kaihautū o te waka a Kurahaupō. I pae te waka ki Te Māhia, kei te tai rāwhiti o Te Ika-a-Māui. I takea mai te ingoa o te iwi i te mokopuna a Whātonga, a Rangitāne. Ko tētahi o ōna ingoa ko Tāne-nui-a-rangi.