There is no information provided regarding a city named Piripiri in the Piauí region of Brazil. The source material provided identifies "Piri piri" exclusively as a cultivar of Capsicum frutescens, also known as the malagueta pepper.
This pepper was originally produced by Portuguese explorers in Portugal's former Southern African territories before spreading to other Portuguese domains. It is frequently used as a culinary ingredient and is often hyphenated or written with variant spellings such as peri-peri or pili pili.