Peoples have a name they call themselves.
Peoples have names spoken by neighbors or enemies that are often scatological or referencing bodily functions and highly derogatory in nature. There can be the name of a Peoples that was given as a practical joke to an unsuspecting anthropologist. And then there are all of the European language spelling permutations of the various names. The real issue is whether or not the name entered on our Atlas insults the named Culture. Names have been placed upon the maps without any malice or intent to insult, and if an insulting name has appeared, it is due to our ignorance.