Brutus de Villeroi (1794–1874) was a French engineer of the 19th century, born Brutus Amédée Villeroi (he added the aristocratic "de" in his later years) in the city of Tours and soon moved to Nantes, who developed some of the first operational submarines, and the first submarine of the United States Navy, the Alligator in 1862.
Brutus de Villeroi was less than 50 years old when he died
Brutus de Villeroi was born in 1794 and died in 1874, which was more than 50 years