denizen (n.)

early 15c., "a citizen, a dweller, an inhabitant," especially "legally established inhabitant of a city or borough, a citizen as distinguished from a non-resident native or a foreigner," from Anglo-French deinzein, denzein, (Old French deinzein) "one within" (the privileges of a city franchise; opposed to forein "one without"), from deinz "within, inside," from Late Latin deintus, from de- "from" + intus "within" (see ento-).

Historically, an alien admitted to certain rights of citizenship in a country; a naturalized citizen (but ineligible to public office). Formerly also an adjective, "within the city franchise, having certain rights and privileges of citizenship" (late 15c.). Compare foreign.