Genoese Blue Jeans

Mention "jeans" or "blue jeans" and someone will comment that they were patented in the 1870s by Levis Strauss and Jacob Davis after Davis put rivets on the pockets to make them strong enough to be worn by miners who wanted to stuff rocks in their pockets. They have become a universal symbol of modern Western culture. But why are they called "jeans"?

They were around before Davis stuck the rivets on the pockets, and there is a theory that the name comes from Gênes, the French word for Genoa. Could the fabric be named for a city? Why not? After all, denim certainly is derived from de Nîmes—"from Nîmes"—because the material comes from the twill fabric first made in Nîmes, France.

Genoa produced a fustian cloth referred to as being of "medium quality and of reasonable cost." "Fustian" was a Latin word (fustaneum) for this type of heavy cotton cloth; originally with a linen warp (the vertical threads held together in the loom) and a cotton weft (the threads passed back and forth by the shuttle). "Fustian" can be applied to corduroy, velvet, or moleskin. 

The Genoese navy used this material for trousers because it was durable and wore well even when wet, unlike wool. Denim was higher quality and used for overgarments. 

Were they "blue" jeans? This jeans development was in the 14th century, and the blue would have had to come from indigo. The word "indigo" as a color is first used in 1289 (that we know of, in English), and the Genoese may have used it, but indigo could be expensive because it had to come from India (hence its name) until the late 19th century, and we don't know that they bothered to dye their jeans material blue.

I think we should talk more about medieval dyes next