An exonym or xenonym is an external name for a geographical place, group of people, or language/dialect: a common name used only outside the place, group or linguistic community in question, usually for historical reasons. Conversely, an endonym or autonym, from the Greek root words , éndon, "within" or , auto-, "self" and ὄνομα, ónoma, "name", is given by members of a particular ethnolinguistic group to the group itself, its language or dialect, or its homeland or a specific place within it.