Where does “cantonal” come from?

cantonal (French) comes from French Canton, from Middle French canton, from Old French canton, from Old Occitan canton — corner; canton.

cantonal (French): cantonal

Definitions

Step	Language	Word	Meaning
1	French	Canton	—
2	Middle French	canton	—
3	Old French	canton	corner
4	Old Occitan	canton	corner; canton

cantonal — Etymology, Origin & Word History | Etymology Explorer