saddlery (n.)

"maker of saddles," c. 1300 (late 13c. as a surname), agent noun from saddle (v.).

noun suffix, in army, city, country, etc., from Old French -e, Latin -atus, -atum, past participle suffix of certain verbs, which in French came to be used to indicate "employment, office, dignity" (as in duché, clergié).