He says his eldest son has just graduated from university in New York and has spent some time working alongside him on the business in Cameroon.

BBC: Housing Cameroon's diaspora

But having decided to be the dutiful eldest son he set about transforming the family business into something beyond the confines of 1920s Dallas.

ECONOMIST: Stanley Marcus

He also just happens to be the eldest son of the Conservative Party's agriculture spokesman, Tim Yeo.

ECONOMIST: Canvassing the politicians

There's no doubt Perelman is a man who takes his prenuptials very seriously: He refused to attend the wedding of his eldest son, Josh, because the bride didn't sign a prenup.

FORBES: Magazine Article

He has most regular contact with Malcolm's fourth-eldest son, Joel, who I also interviewed for the programme and found to be very personable and amiable.

BBC: SPORT | Football | My Club | Man Utd | In search of the Glazers

While John Adams had groomed his son to be president, George Bush, the 41st president, insisted he was surprised when the eldest of his six children became interested in politics, became governor of Texas, and then went on to the White House.

WHITEHOUSE: George W. Bush