Jeans are pants made from denim or dungaree cloth. They were invented by Jacob Davis and Levi Strauss in 1873 and a worn still but in a different context. Jeans are named after the city of Genoa in Italy, a place where cotton corduroy, called either jean or jeane, was manufactured. Levi Strauss came from Germany to New York in 1851 to join his older brother who had a dry goods store.
In 1853 he heard about Gold Rush in the West so moved to San Francisco to establish Western Branch of the family dry goods business. There he sold, among other things, cotton cloth. One of his customers was Jacob W. Davis, a tailor from Reno, Nevada. Davis made functional items such as tents, horse blankets, and wagon covers.
One day, his customer ordered a pair of sturdy pants that could withstand hard work. He made them from denim that he bought from Levi Strauss & Co and made them stronger by placing copper rivets at the places pants rip the most: pockets and flies. When he wanted to patent them, he wrote to Levi Strauss, and they became partners. They opened a bigger factory, and that is how jeans were born.