PARIS — Marc Jacobs, the star designer who turned Louis Vuitton from a staid luggage-maker into a global fashion brand, is leaving to focus on his own eponymous label, a source close to the French company's parent LVMH said on Wednesday. The move follows a series of leadership changes at Louis Vuitton, LVMH's cash cow and biggest profit- and revenue- contributor, aimed at helping the brand regain some of its lost prestige after a sustained decline in sales over the past year. "Marc Jacobs is leaving Vuitton and will focus on his own brand," the source said on condition of anonymity. LVMH and Marc Jacobs declined to comment. Jacobs' departure comes a month after LVMH founder and chief executive Bernard Arnault appointed his daughter Delphine as deputy head of Louis Vuitton and replaced last year longstanding chief Yves Carcelle with group veteran Michael Burke.