The Ínclita Geração is a term commonly used by Portuguese historians to refer to a group of 15th-century infantes (princes) of the House of Aviz, specifically the sons of King John I of Portugal and his wife Philippa of Lancaster : the future king Edward of Portugal; the future regent Peter of Coimbra; Prince Henry the Navigator; the constable John of Reguengos; and the martyr Ferdinand the Holy Prince.

John I, also called John of Aviz, was King of Portugal from 1385 until his death in 1433. He is recognized chiefly for his role in Portugal's victory in a succession war with Castile, preserving his country's independence and establishing the Aviz dynasty on the Portuguese throne. His long reign of 48 years, the most extensive of all Portuguese monarchs, saw the beginning of Portugal's overseas expansion. John's well-remembered reign in his country earned him the epithet of Fond Memory ; he was also referred to as "the Good", sometimes "the Great", and more rarely, especially in Spain, as "the Bastard" (Bastardo).