The term "Tibetan" originates from the European exonym "Tibet", which first appeared in English in the 18th century. The name "Tibet" itself is not native but likely entered European languages via early travelers' accounts, with proposed roots in Turkic "Töbäd" (meaning "the heights") or Persian. The English suffix "-an", of Latin origin via French, was appended to form the adjective and demonym, following a common pattern for creating words that denote origin or association (e.g., American, Roman). Thus, "Tibetan" linguistically constructs the concept of "pertaining to or originating from the land known as Tibet."

The word is a toponymic derivative formed from the place name "Tibet" with the addition of the English adjectival and demonymic suffix "-an". The suffix "-an" is from Latin "-anus", meaning "belonging to" or "pertaining to". The core element "Tibet" is an exonym of uncertain origin, possibly deriving from early Turkic or Persian sources.