a member of a South American Indian people whose great empire centred on Peru lasted from about 1100 ad to the Spanish conquest in the early 1530s and is famed for its complex culture
2.
the ruler or king of this empire or any member of his family
1590s, from Spanish Inga (1520s), from Quechea Inca, literally "lord, king." Technically, only of the high Inca, but it was used widely for "man of royal blood."