'arizonian' originates from English, derived from the place-name 'Arizona' plus the adjective/nationality-forming suffix '-ian' (from Latin '-ianus'), meaning 'belonging to or from'.

'Arizona' entered English from Spanish 'Arizona' (a place name). The adjective/nationality form was created by adding the suffix '-ian' to produce 'Arizonian', signifying relation or origin from Arizona.

Initially formed to mean 'of or relating to Arizona' or 'a person from Arizona'; this meaning has been retained in modern usage.