-an / ə n/ AmE ( also -ean , -ian ) suffix
[ Language: Old French ; Origin: -en , from Latin -anus ]
1 . [in adjectives and nouns] someone or something of, from, or connected with a particular thing, place, or person:
suburban
Jamesian
2 . [in nouns] someone skilled in or studying a particular subject:
a historian (=someone who studies history)