I thought Inca was more like a family name and the people were the subjects. Like President Bush, but not everyone in America was called the Bush civilization. So what did the Inca call the Incas?
The Inca was the leader, but the term has always been applied to his entire culture because A) the real name probably is difficult to pronounce, or B) there was no one name, because the Incan empire was polyglot (as are all of ‘em).