Guinea pig Their scientific name Guinea pig sounds in Latin as Cavia porcellus, which translates as little piggy. Interestingly, they also belong to the mumps, one of the rodent species. But in many languages, the name of this species is translated exactly as "pig". Guineas biggetje or Guinea pig in the Dutch, the little Indian pig or Porquinho da India in the Portuguese. But the Spaniards distinguished themselves and called this kind of animal as "little Indian rabbit".