I'm in the process of overananlyzing the film Moana. During my research, I discovered that the Polynesians did actually believe that an ancestor could reincarnate - as an animal, another person, a rock... These were called nā ʻaumākua. In the Moana film, Grandma Tala gets a tattoo of the animal that she believes that she'll reincarnate as (a sting ray, as it happens).
Did the Polynesians actually get tattoos of what animal they believed that they would reincarnate as?