Nkoroo is a town in the Bonny territory of the Rivers State, Nigeria. It is also the name of the people living there, numbering about 4,000. The Nkoroo people live in close relationship with the Defaka. The Defaka (sometimes called Afakani) are a small ethnic group of south-western Nigeria, numbering less than a thousand people. ...
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Thus, the Defaka and Nkoroo peoples have presumably been living together as neighbours prior to the establishment of Nkoroo town, perhaps even since the time that both of them were in the Okrika territory.
Ethnically, the Defaka are distinct from the Nkoroo, but they have assimilated to Nkoroo culture to such a degree that their language seems to be the only sign of a distinct Defaka identity.
Use of the Defaka language however is quickly receding in favour of the language of the Nkoroo.