John Stuart Mill was born on May 20, 1806 and died on May 8, 1873. John Stuart Mill would have been 66 years old at the time of death or 206 years old today.
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John McDouall Stuart was born on September 7, 1815 and died on June 5, 1866. John McDouall Stuart would have been 50 years old at the time of death or 196 years old today.
John Stuart Hindmarsh was born on November 25, 1907 and died on September 6, 1938. John Stuart Hindmarsh would have been 30 years old at the time of death or 104 years old today.