The case of the family of Bernard Arnault, chairman-CEO of Louis Vuitton, and world's richest man, is just as speculative as the Roys and Murdochs. Eldest child, Delphine, and four sons, Antoine, Frederic, Alexandre, and Jean - each with roles in the luxury fashion house empire, vying for control. Arnault Sr responded to an analyst's question regarding succession plans earlier this year: 'You will have noticed that the retirement age is being raised.'
