<P> (83 years) </P> <Tr> <Td> Stephen Girard </Td> <Td> </Td> <Td> 1750--1831 <P> (81 years) </P> </Td> <Td> 105--120 </Td> <Td> French - born American banker . Before becoming a banker, he was a merchant and owned a fleet of trading ships . </Td> </Tr> <P> (81 years) </P> <Tr> <Td> William Henry Vanderbilt </Td> <Td> </Td> <Td> 1821--1885 <P> (64 years) </P> </Td> <Td> 52--239 </Td> <Td> Railroad owner . Inherited much of his wealth from his father, Cornelius Vanderbilt, who initiated the Vanderbilt family's involvement in railroad and shipping business . He doubled his father's fortune, to an amount estimated between $52 billion and $239 billion . </Td> </Tr>

Who had the highest net worth of all time