Prince Pierre, Duke of Valentinois
Pierre Comte de Polignac from the house of the Ducs de Polignac of the tribe Chalençon, since March 18, 1920 Pierre Grimaldi, Prince of Monaco ( born October 24, 1895 in Morbihan, Castle of Kerscamp, † November 10, 1964 in Neuilly -sur -Seine ), was by Monegasque ceremony Duke of Valentinois ( Duc de Valentinois ) (on the occasion of his engagement with the Monegasque Hereditary Princess Charlotte Grimaldi of Monaco). He was the father of Prince Rainer III. of Monaco.
His full name was before his engagement: Pierre Marie Xavier Antoine Melchior de Polignac Count from the home of the Dukes of Polignac.
According to the Regulation of the father of the Hereditary Princess of Monaco, Prince Louis II, he had on March 18, 1920 a day before the wedding in Monaco on March 19, 1920 to accept the coat of arms and the name Grimaldi.
The marriage ended in divorce on 18 February in Monaco in 1933, came from the born in Paris on December 28, 1920 Princess Antoinette Louise Alberte Suzanne of Monaco, Baroness of Massy ( † 18 March 2011), and on May 31, 1923 born in Monaco later Prince Rainier III.