generous: [16] Generous comes via Old French genereux from Latin generōsus, which originally meant ‘of noble birth’ (a sense which survived in English into the late 17th century – Richard Knolles, for instance, in his General history of the Turks 1603, wrote of ‘many knights of generous extraction’). It was a derivative of genus in the sense ‘birth, stock, race’, and harks back semantically to its ultimate source in the Indo-European base *gen- ‘produce’ (see GENERAL). Its semantic progression from ‘nobly born’ through ‘noble-minded, magnanimous’ to ‘liberal in giving’ took place largely in Latin. => general
generous (adj.)
1580s, "of noble birth," from Middle French généreux (14c.), from Latin generosus "of noble birth," figuratively "magnanimous, generous," from genus (genitive generis) "race, stock" (see genus). Secondary senses of "unselfish" (1690s) and "plentiful" (1610s) in English were present in French and in Latin. Related: Generously; generousness.