Napoleon wanted his brother Lucien to marry the Spanish Queen..

… of Etruria, being of Bourbon descent  in order to tie the countries together.  Lucien ran away and hid in Rome.

Instead, he married the illiterate sister of his housekeeper, Christine Boyer.

(Portrait: Queen of Etruria and Duchess of Lucca, Maria Luisa.. whom Lucien did NOT marry..)(note the pearls; in the next generations, royalty will almost always wear pearls with official ensembles)