Albert II, Prince of Monaco
As Monaco's head of state, Prince Albert II is depicted on coins, including collectors' coins, with very rare exceptions. One of the most recent examples is the €5 silver Prince Albert II commemorative coin, the first commemorative coin with his effigy on it, minted in 2008. On the obverse, the prince is depicted in profile with his name on the top of the coin. On the reverse, the Grimaldi coat of arms appears; around it, the words "Principauté de Monaco" (Principality of Monaco) also appear along with the nominal monetary value of the coin.As the prince, his official shortened title is "His Serene Highness Albert II, Sovereign Prince of Monaco"; this does not include the many other styles claimed by the Grimaldi family.
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: