'armenian' originates from Ancient Greek 'Armenía' (Αρμενία) via Latin 'Armenia', ultimately referring to the region and its people (from Old Persian 'Armina').

'armenian' derived from Ancient Greek 'Armenía', passed into Latin as 'Armenia', appeared in Medieval and Old French forms and Middle English (e.g. 'Armenye'), and eventually became the modern English word 'armenian'.

Initially it designated someone or something 'of or from the region of Armenia'; over time it has retained that core sense and now broadly means 'relating to Armenia, its people, culture, or language'.