There are a number of multigeneration billionaire families involved in complex multiple businesses.

Who are they, how have they fared over generations.

Examples: Westons of Canada (multiple retail businessed worldwide), waltons, batclays, murdochs, ford, the family that owns C&A and other retailers

Some may be too simple e.g. Albrects, Sainsburys.

Exlude historical property businesses like Grosvenors