Name of Mexico to the formation of the Mexican Republic which formally is known as the United Mexican States. Complications arose with the capital's former colloquial and semi-official name "Ciudad de Mexico, Distrito Federal (Mexico, D.F.)", which appears on postal addresses and is frequently cited in the media, thus creating a duplication whereas the shortened name was "Mexico, D.F., Mexico". Legally, the name was Distrito Federal (Federal District or District of the Federation). This ended with the change in statute of Mexico City into a state in 2016. Today it is officially called "Ciudad de México, México" abbreviated CDMX, Mexico. The official name
English Place-Name Society Society has published an annual "Journal", which contains essays on various place-name topics. English Place-Name Society The English Place-Name Society (EPNS) is a learned society concerned with toponomastics and the toponymy of England, in other words, the study of place-names (toponyms). Its scholars aim to explain the origin and history of the names they study, taking into account factors such as the meaning of the elements out of which they were created (which can be in languages such as Old English, or early Welsh, Danish, Norwegian or Cornish etc.); the topography, geology and ecology of the places bearing the names;