They are widespread across northernmost South America, from the mouth of the Amazon River to the Colombian Andes, but also appear in central Brazil.
Some languages, such as the Cariban languages, can be said to have a possessed case, used to indicate the other party (the thing possessed) in a possession relationship.
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This does not however affect the entire vocabulary but when it does, the terms used by men generally come from Carib and those used by women come from Arawak.