Eugène Rose de Beauharnais was a French nobleman, statesman, and military commander who served during the French Revolutionary Wars and the Napoleonic Wars. Through the second marriage of his mother, Joséphine de Beauharnais, he was the stepson of Napoleon Bonaparte. Under the French Empire he also became Napoleon's adopted son. He was Viceroy of the Kingdom of Italy under his stepfather, from 1805 to 1814, and commanded the Army of Italy during the Napoleonic Wars. Historians consider him one of Napoleon's most able relatives.

Joséphine Bonaparte was Empress of the French as the first wife of Emperor Napoleon I from 18 May 1804 until their marriage was annulled on 10 January 1810. As Napoleon's consort, she was also Queen of Italy from 26 May 1805 until the 1810 annulment. She is widely known as Joséphine de Beauharnais.