The Cuy Story: Why Guinea Pigs Aren't Pigs or From Guinea
The short answer is that the name "Guinea Pig" is a historical misnomer—it is misleading on both counts: they are not pigs and they are not from Guinea (in West Africa).
The indigenous name in the Andes, where the animal originated and is still a traditional food source, is Cuy (pronounced kwee or koo-ee), which is an onomatopoeic word derived from the sound the animal makes.
Why "Pig"?
The "pig" part of the name is easier to trace, stemming from various characteristics that reminded European observers of a small swine:
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Scientific Name: The animal's scientific name is Cavia porcellus.
The species name, porcellus, is Latin for "little pig," which was likely the earliest official European classification of the rodent.
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Body Shape: They have a stout, compact body, a large head relative to their body size, a rounded rump, and no visible tail, giving them a somewhat pig-like appearance.
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Sounds: They make various grunting, wheeking, and squealing sounds that are similar to those made by a small pig or piglet.
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Eating Habits: They are known for having a tremendous appetite and spending a great deal of time eating, which reinforced the "pig" association.
Why "Guinea"?
The "Guinea" part of the name is far more debated and complicated. The guinea pig is native to the Andes Mountains of South America, not the country of Guinea in West Africa.
The leading theories relate to geography, trade, and currency:
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Exotic, Faraway Place: In 17th-century English, the word "Guinea" was often used as a generic, colloquial term to mean any distant, exotic, or unknown country across the sea.
The name simply suggested that the animal was an unusual import from a faraway, southern land.
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Corruption of "Guiana": One hypothesis suggests that "Guinea" is a corruption or mispronunciation of "Guiana," a region in northeastern South America (near modern-day Venezuela, Guyana, Suriname, etc.). As the animals were brought back to Europe from South America, the name might have been mistakenly associated with this nearby area.
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Trade Route Stop: They may have been transported to Europe on ships that either frequently stopped at ports in Guinea (West Africa) or, less likely, were called "Guinea-men" because they plied the triangular trade routes.
The place name may have simply been attached to the exotic cargo.
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The Debunked Currency Theory: A popular but incorrect theory is that they were named because they were sold for a price of one Guinea (an English gold coin).
This theory is false because the term "Ginny-pig" was used as early as 1653, while the Guinea coin was not struck until 1663.
In essence, the Western name is an artifact of confused sailors and naturalists who used familiar reference points (a small pig-like shape and a vague exotic location) to describe a fascinating new animal brought back from the Andes.
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