Origin of -eanfrom Classical Latin -ae-, -e-, -i- and Classical Greek -ai-, -ei- (stem endings of nouns and adjectives) + -an
- 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).
From Latin -ānus, following Latin stems ending in -e(us), -ē(us) (many from Ancient Greek -ηιος), or -æ(us) (many from Ancient Greek -αιος).