Demonym

A demonym ( /ˈdɛmənɪm/), also referred to as a gentilic, is a name for a resident of a locality. A demonym is usually, though not always, derived from the name of a locality;; the demonym for the people of Britain is British, and the demonym for the people of Turkey is Turk, yet the one used in the English language for the people of the Netherlands is Dutch (in Dutch: Nederland/Nederlander).

Read more about Demonym:  About The Term demonym, Demonyms As Roots, Adjectives As Placenames, Suffixation, Irregular Forms, Double Forms, Fiction, Cultural Problems