The Bonapartes rose from minor Corsican nobility to the summit of Europe in a single generation. Carlo Buonaparte and Letizia Ramolino raised eight children who survived to adulthood, and the second son, Napoleon, made the family name imperial. Around him orbited his brothers Joseph, Lucien, Louis, and Jérôme, and his sisters Elisa, Pauline, and Caroline — a sibling group that Napoleon treated less as relations than as a governing cabinet.
The genogram of the dynasty is essentially a map of Napoleon's statecraft. He installed Joseph as King of Naples and then of Spain, Louis as King of Holland, Jérôme as King of Westphalia, and his sisters as duchesses and a grand duchess, wiring a whole continent to his bloodline through appointment and marriage. His own marriages were dynastic instruments in turn: he annulled his union with Joséphine de Beauharnais, who bore him no heir, to marry Marie-Louise of Austria — a Habsburg archduchess — in 1810, deliberately grafting his upstart line onto Europe's oldest royal house.
That second marriage produced the dynasty's fragile pivot: Napoleon II, styled the King of Rome at birth and later the Duke of Reichstadt, who never reigned and died of tuberculosis at twenty-one in his Habsburg grandfather's Vienna. The imperial succession therefore jumped sideways down the family tree. It landed on Louis-Napoleon, son of Napoleon's brother Louis and of Hortense de Beauharnais — Joséphine's daughter — which made the eventual Napoleon III a nephew of the first emperor twice over, by blood and by marriage.
The line that began on Corsica ended its reign in exile: Napoleon III fell in 1870, and his only son, the Prince Imperial, was killed in 1879 fighting for the British against the Zulu in South Africa — the last direct male heir of the ruling branch dying in a colonial skirmish an ocean away from any French throne.
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