The Village was founded over 70 years ago by Mr. Ambrose. He was the first Toshao and the Village was named after him – Ambrose. After he died, the 2nd Toshao renamed Ambrose to Potarinau in the late 1970s. Potarinau is situated at the west bank of Sawariwau Creek. the native language of the people of Potarinau is Wapichan. The village has a nursery school, primary school, multipurpose building and health post.

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