Jean Look up Jean at Dictionary.com
masc. proper name, from French equivalent of John. Fem. proper name is from French equivalent of Jane.
jean (n.) Look up jean at Dictionary.com
"twilled cotton cloth," mid-15c., from Middle French jean fustian "fustian (a type of twilled cotton cloth) of Genoa," the city in Italy, from Old French Jannes "Genoa," from Latin Genua (see Genoa). The plural form jeans became standard 19c.