According to Carosino's municipal website, Antonio Cinque believes that the name derives from the Latin "carus" (dear, precious, valued) and "situs" (site) or "sinus" (valley).

G. Giovine believes that "sinus," which can also mean a fold of clothing or the bosom of a person, is related to the religious significance of Mary, mother of Jesus in the town.

In the 1460s, a band of armed Albanians, following in the wake of Skanderbeg, razed the village, which was a feudal possession of a local nobleman, Raimondo de Noha.

It was probably at this time that the Byzantine Rite form of Christianity disappeared from the area, along with the Arbëresh language of the Albanian settlers left over from the previous century, due to the efforts of Archbishop Lelio Brancaccio.

[5] The church of Santa Maria delle Grazie, now located along Via Dante north of the town's main square, Piazza Vittorio Emanuele III, was probably built in the 15th century.