Tohunga

Tohunga was the name for the Matoran of Mata Nui after being weakened by Makuta's Matoran Pods. They lost all memory of their lives on Metru Nui and some of them had their masks replaced and their names changed. After the attack of the Bohrok-Kal, the Turaga of Mata Nui taught them how to rebuild themselves into forms that more closely resembled their Metru Nui forms, and they were called Matoran again.

Trivia

 * The real reason that the word was taken out of the story was that it was a Maori word, which caused a controversy causing Lego to rename Tohunga as 'Matoran'. For the same reason, the Matoran named Jala, Huki, and Maku were renamed Jaller, Hewkii, and Macku, respectively, and the Ussal crab Puku was renamed Pewku.