The most elegant “handshake link” of a living celebrity to Napoleon Bonaparte, who died 200 years ago this month, is likely via singer Paul McCartney, who was taught to oppose the Vietnam War in 1965 by mathematician Bertrand Russell (1872–1970), who grew up in the house of his grandfather, Prime Minister John Russell (1792–1878), who had a 90 minute interview with Napoleon on Elba in 1814.
There are of course other living people who knew Bertrand Russell, such as, likely, Queen Elizabeth II, but I like the McCartney connection.
Of course, one question is whether all these people who had face to face conversations shook hands. Perhaps etiquette required that the Emperor not shake hands?