What is "ninigret"

Ninigret [also known as Juanemo according to Roger Williams] (c.1610-1677) was a sachem of the eastern Niantic Native American tribe in New England. Ninigret allied with the English settlers and Narragansetts against the Pequots in 1637. Ninigret did not participate in King Philip's War and was largely responsible for preventing the Niantics from joining the War.