quality:corruption, linguistic:voice_change
Etymology

The name of the country may be derived from Birú, the name of a local ruler who lived near the Bay of San Miguel, Panama City, in the early 16th century. Spanish conquistadors, who arrived in 1522, believed this was the southernmost part of the New World. When Francisco Pizarro invaded the regions farther south, they came to be designated Birú or Perú.

An alternative history is provided by the contemporary writer Inca Garcilaso de la Vega, son of an Inca princess and a conquistador. He said the name Birú was that of a common Amerindian who was happened upon by the crew of a ship on an exploratory mission for governor Pedro Arias Dávila and went on to relate more instances of misunderstandings due to the lack of a common language.

The Spanish crown gave the name legal status with the 1529 Capitulación de Toledo, which designated the newly encountered Inca Empire as the province of Peru. In 1561, the rebel Lope de Aguirre declared himself the "Prince" of an independent Peru, which was cut short by his arrest and execution. Under Spanish rule, the country adopted the denomination Viceroyalty of Peru, which became the Peruvian Republic from its independence until 1979, when it adopted its current name of Republic of Peru.