The exact origins of the Moriori people within Polynesia are still debated, but the most common theory is that they were related to the Māori people of New Zealand. Genetic studies suggest that they shared a common ancestor with the Māori who arrived in New Zealand about 1,200 years ago.
It's thought that a group of Māori ancestors sailed east from New Zealand, likely in several voyages, and settled on the Chatham Islands. Over time, they developed their own distinct culture and language, adapting to the unique environment of the Chatham Islands.
While the Moriori are closely connected to the Māori, their culture and language evolved differently. This demonstrates how different environments and isolation can shape the development of indigenous groups.