Guinea pigs are not from Guinea and they are not members of the pig family.

(The Latin name for guinea pig is cavia porcellus, which looks suspiciously like “cave pig, but they are actually a kind of rodent like a mouse, rat, beaver, porcupine or hamster.

Many years ago guinea pigs only lived in South America. The local people used them for food. Traders visiting South America returned with them and they have since spread all over the world as pets.)