The crossword solution for the term 'Jeans First Name' is Levi, which is a four-letter word. Levi Strauss was an American businessman who founded the first company to manufacture blue jeans. He was born in Bavaria in 1829 and immigrated to the United States in 1853. In 1873, he patented the process of using copper rivets to reinforce the pockets of denim work pants, creating the first pair of modern jeans. His company, Levi Strauss & Co., is still in business today and is one of the most recognizable brands in the world.