Louis I, Grand Duke of Hesse
In 1776, he became engaged to Sophie Dorothea of Württemberg, eldest daughter of Frederick II Eugene, Duke of Württemberg. The engagement was broken off so that Sophia Dorothea could marry Louis's recently widowed brother-in-law Tsarevich Paul Petrovich, son and heir of Catherine II "the Great", Empress of Russia. He received a monetary compensation when the engagement was broken.
Infante Francisco de Paula, Duke of Cádiz
As Infante Francisco settled in the Royal Palace, his father, Carlos IV, shortly before his death, negotiated Francisco's marriage to Princess Luisa Carlotta of Bourbon Two Sicillies. This was with the consent of Ferdinand VII. Luisa Carlotta was the eldest daughter of Francis I of the Two Sicilies and Maria Isabel of Spain, Infante Francisco's sister. This was a union between uncle and niece. The couple married by proxy on 15 April 1819. On 14 May, Luisa Carlotta arrived in Barcelona. The ceremonial wedding took place on 9 June 1819 at the Royal Palace of Madrid. Francisco de Paula was twenty-five years old; Luisa Carlotta was only fifteen. She was lively, witty, strong willed, hot tempered and ambitious. Luisa Carlotta quickly dominated her husband, won the King's heart, and began to produce children who were granted the rank and status of Infantes of Spain. Between 1820 and 1834 the couple had eleven children. The family lived in a wing of the royal palace of Madrid and also spent periods of time at the palaces of la Granja, Aranjuez and Sevilla.