-an
/(ə)n/suffix
1Forming adjectives and nouns, especially from:
1.1Names of places: Cuban
1.2Names of systems: Anglican
1.3Names of zoological classes or orders: crustacean
1.4Names of founders: Lutheran
2an Chemistry Forming names of organic compounds, chiefly polysaccharides: dextran
Origin
From Latin -anus, -ana, -anum.