Were Napoleon and Alexis de Tocqueville alive at the same time?
Yes. Napoleon and Alexis de Tocqueville were alive at the same time for 15 years, from 1805 to 1821.
Napoleon was 35 when Alexis de Tocqueville was born.
Alexis de Tocqueville was 15 when Napoleon died, aged 51.
Napoleon
French military leader, French Emperor 1804–1814 and again in 1815
Born 15 August 1769 · died 5 May 1821, aged 51
Alexis de Tocqueville
French political thinker and historian, minister of Foreign Affairs
Born 29 July 1805 · died 16 April 1859, aged 53