- Forms adjectives, usually from proper nouns.
- Almost all English words ending in "ean" are originally from Latin (Caesarean) or Greek (Euclidean). A few were later formed by adding -an to a stem or word ending in -ea (Korean), -es (Andean), or a silent -e (Boolean).
- Forms adjectives and nouns indicating origin or place of birth (such as from a certain city or region), or occasionally nationality.
declension of -ean