Paul Marciano (born in 1952) is an American fashion designer, businessman, investor, and philanthropist. Initially run by all four Marciano brothers (Paul, Armand, Maurice and Georges). In 1981, the Marciano brothers founded Guess Jeans. In 1983, they sold a 50% stake in Guess Jeans to the Nakash Brothers (Joseph "Joe" Nakash, Abraham "Avi" Nakash, and Raphael "Ralph" Nakash) of New York. Today the company and its extension lines, Marciano and G by Guess, are handled by Paul and Maurice. He is also a large benefactor to one of the larger Sephardic synagogues in Los Angeles, Em Habanim.