The first known reference to trousers called jeans actually came from mid-19th century England.
The name jeans came from a kind of tough twilled cotton cloth called "jean" which is the shortened term for "jean fustian", which was introduced into English in the mid-16th century, in which the "jean" represented a modification of Janne, the Old French name of the Italian city of Genoa.
The name "jean fustian" was "cotton fabric from Genoa", so named because that was where it was first made.
Have you ever heard that chromosomes have dungarees? In other words, is it possible that genes wear jeans?