Napoleon 's son Napoléon François Charles Joseph ( 1811-1832 ) was created King of Rome ( 1811-1814 ) and was later styled Napoléon II by loyalists of the dynasty , though he only ruled for two weeks after his father 's abdication .
Napoleon 's son Napoleon François Charles Joseph ( 1811-1832 ) was created king of Rome ( 1811-1814 ) and was later styled Napoleon II by loyalists of the dynasty , though he only ruled for two weeks after his father 's abdication .