an Entity references as follows:
Napoléon, Prince Imperial (Napoléon Eugène Louis Jean Joseph Bonaparte; 16 March 1856 – 1 June 1879), also known as Louis-Napoléon, was the only child of Napoleon III, Emperor of the French, and Empress Eugénie. After his father was dethroned in 1870, he moved with his family to England. On his father's death in January 1873, he was proclaimed by the Bonapartist faction as Napoleon IV.