The Polynesian people are considered to be by linguistic, archaeological and human genetic ancestry a subset of the sea-migrating Austronesian people and tracing Polynesian languages places their prehistoric origins, ultimately, in Taiwan.
Taiwan is in South East Asia.
I suggest reading the Wiki article, it's quite accurate to the history book I read.
South America.
Polynesians arrived in the Bismarck Archipelago of Papua New Guinea at least 6,000 to 8,000 years ago, via Indonesia, and presumably left the mainland (mainland Southeast Asia) about 10,000 years ago.
omg they came from melanesia