Louis II, Prince of Monaco
On 26 June 1922, Prince Albert I died in Paris. Louis Grimaldi ascended to the throne as Louis II, Prince of Monaco. While his reign never achieved the grandeur of his father, Louis II left an indelible imprint on the tiny principality. In 1924 the Monaco Football Club was formed and in 1929, the first Grand Prix of Monaco automobile race was held, won by Charles Grover (aka "Williams") driving a Bugatti painted in what would become the famous British racing green color. He collected artefacts belonging to Napoleon I which are now assembled and displayed in the Napoleon Museum attached to the Royal Palace in Monte Carlo.
Princess Marie Amelie of Baden
In 1869, her only daughter Lady Mary Victoria Hamilton married Prince Albert (later Albert I), son and heir of Charles III, Prince of Monaco. The union was unhappy, however, and Mary left Monaco and her husband after giving birth to an heir, Louis II. The marriage was annulled in 1880. She later married the Hungarian magnate Prince Tasziló Festetics, living from that point onwards mainly in her husband's native country. Through Mary, Marie is the great-great-grandmother of the current reigning prince of Monaco, Albert II. 
The Duke and Duchess of Hamilton had the following issue, two sons and one daughter: