Mananui Te Heuheu Tà «kino II (died 7 May 1846) was a New Zealand MÃÂori tribal leader of the NgÃÂti Tà «wharetoa iwi.
The eldest son of Herea Te Heuheu Tukino I and his first wife, Rangiaho of NgÃÂti Maniapoto, Mananui was born in Pamotumotu, King Country, near the Mangatutu Stream and was the second of the Te Heuheu line to assume the leadership of NgÃÂti Tà «wharetoa. Mananui traced his ancestry to Tama-te-kapua, commander of Te Arawa canoe, and to its priest, Ngatoro-i-rangi. He was distantly related to Potatau Te Wherowhero of Waikato and Te Rauparaha of NgÃÂti Toa. He belonged to NgÃÂti Pehi (now NgÃÂti Turumakina), NgÃÂti Hukere and NgÃÂti Hinewai hapà «, and in his youth lived at Pamotumotu.
Mananui led NgÃÂti Tà «wharetoa in war against other tribes, including a war with NgÃÂti Maru from about 1822 to 1832.
On the morning of 7 May 1846, an avalanche of mud descended from Hipaua Hill at the back of Te Rapa pÃÂ, and overwhelmed Te Heuheu, his six wives, his eldest son, Tamati Waka, and fifty-four others. Only two people who were in the pÃÂ survived. The pÃÂ is buried under of mud. The cause of the calamity was heavy rain three days earlier, which had caused small landslides that blocked a small valley partway up Hipaua Hill. Water from the rains and from hot springs at the top of the valley built up behind the barrier, until it burst, creating a great avalanche of thick mud and large masses of stone, which buried the pÃÂ. The Rev. Richard Taylor was present on 1 July 1846 at the tangihanga for Te Heuheu.
Mananui was succeeded by his brother Iwikau Te Heuheu Tà «kino III in 1846 and was the father of Te Heuheu Tà «kino IV who assumed the leadership of NgÃÂti Tà «wharetoa in October 1862 following the death of his uncle Iwikau.