Question: Who is the godmother of the youngest child of Rainier III?

full_context: Document 1: Princess Margaretha of Liechtenstein: Princess Margaretha of Liechtenstein (born "Princess Margaretha of Luxembourg" on 15 May 1957) is the fourth child and second daughter of Grand Duke Jean of Luxembourg and Princess Joséphine Charlotte of Belgium. As the sister of Grand Duke Henri of Luxembourg and the sister-in-law of Prince Hans-Adam II of Liechtenstein, she is a princess of two current realms and a member of the Luxembourg and Liechtenstein reigning dynasties. The Princess holds similar precedence in both monarchies, as sister and sister-in-law of the Sovereign.
Document 2: Princess Stéphanie of Monaco: Princess Stéphanie of Monaco, Countess of Polignac (Stéphanie Marie Elisabeth Grimaldi; born 1 February 1965) is the youngest child of Rainier III, Prince of Monaco, and American actress princess Grace of Monaco, and the sister of Albert II, Prince of Monaco, and Caroline, Princess of Hanover. Currently 11th in the line of succession to the Monegasque throne, she has been a singer, swimwear designer and fashion model.
Document 3: Alice Heine: Alice Heine (February 10, 1858 – December 22, 1925), styled HSH The Princess of Monaco, previously The Duchess of Richelieu, was the American-born second wife of Prince Albert I of Monaco, a great-grandfather of Prince Rainier III of Monaco and great-great grandfather of reigning prince Albert II of Monaco. Marcel Proust used her as a model for the "Princesse de Luxembourg" in his novel, "In Search of Lost Time". Her first husband was the Duke of Richelieu, and one of the titles of her second husband was the Duke of Mazarin; she was thus unique in bearing the titles of both Cardinal Richelieu and Cardinal Mazarin.
Document 4: Andrea Casiraghi: Andrea Albert Pierre Casiraghi (born 8 June 1984) is the elder son of Caroline, Princess of Hanover, and her second husband Stefano Casiraghi. He is the eldest grandchild of Rainier III, Prince of Monaco, and American actress Grace Kelly. Casiraghi is currently fourth in the line of succession to the Monegasque throne, following his twin cousins and mother.
Document 5: Pierre Casiraghi: Pierre Rainier Stefano Casiraghi (born 5 September 1987) is the younger son of Caroline, Princess of Hanover, and her second husband, Stefano Casiraghi. His maternal grandparents were Rainier III, Prince of Monaco, and American actress Grace Kelly. Casiraghi is seventh in the line of succession to the Monegasque throne, following his twin cousins, his mother, brother Andrea, nephew Alexandre, and his niece India Casiraghi.
Document 6: Anne, Princess Royal: Anne, Princess Royal, {'1': ", '2': ", '3': ", '4': "} (Anne Elizabeth Alice Louise; born 15 August 1950) is the second child and only daughter of Queen Elizabeth II and Prince Philip, Duke of Edinburgh. At the time of her birth, she was third in the line of succession to the British throne, behind her mother – then Princess Elizabeth – and elder brother, Charles. She rose to second after her mother's accession, but is currently 12th in line.
Document 7: Monarchy of Monaco: The Sovereign Prince or Princess of Monaco is the reigning monarch and head of state of the Principality of Monaco. All princes or princesses have officially taken the name of the House of Grimaldi, but have belonged to various other houses (Goyon de Matignon, Polignac) in male line. The present reigning prince is Albert II.
Document 8: Albert II, Prince of Monaco: Albert II (Albert Alexandre Louis Pierre Grimaldi; born 14 March 1958) is the reigning monarch of the Principality of Monaco and head of the princely house of Grimaldi. He is the son of Prince Rainier III and the American actress Grace Kelly. Prince Albert's sisters are Caroline, Princess of Hanover, and Princess Stéphanie. In July 2011, Prince Albert married Charlene Wittstock.
Document 9: Princess Antoinette, Baroness of Massy: Princess Antoinette of Monaco, Baroness of Massy (Antoinette Louise Alberte Suzanne Grimaldi; 28 December 1920 – 18 March 2011) was a member of the princely family of Monaco and the elder sister of Prince Rainier III and aunt of Albert II, Prince of Monaco. Her parents were Count Pierre de Polignac and Princess Charlotte, Duchess of Valentinois.
Document 10: Caroline, Princess of Hanover: Caroline, Princess of Hanover (Caroline Louise Marguerite Grimaldi; born 23 January 1957), is the eldest child of Rainier III, Prince of Monaco, and American actress Grace Kelly. She is the elder sister of Prince Albert II and Princess Stéphanie. Until the births of her niece and nephew Princess Gabriella and Prince Jacques of Monaco in December 2014 she had been heir presumptive to the throne of Monaco since 2005, a position which she previously held from 1957 to 1958.
Document 11: Elisabeth-Anne de Massy: Elisabeth-Anne de Massy (Noghès) was born in Monaco on 13 January/13 July 1947 to Princess Antoinette of Monaco and her then lover Alexandre-Athenase Noghès. She is a first cousin of the reigning Prince Albert II and niece of Rainier III. She is the godmother of Princess Stéphanie of Monaco. Although Elisabeth-Anne was born out of wedlock, her parents married in 1951, thus legitimizing her, and placing her in line to the throne.
Document 12: Grace Kelly: Grace Patricia Kelly (November 12, 1929September 14, 1982) was an American actress who became Princess of Monaco after marrying Prince Rainier III, in April 1956.
Document 13: Rainier III, Prince of Monaco: Rainier III (born Rainier Louis Henri Maxence Bertrand Grimaldi; 31 May 1923 – 6 April 2005) ruled the Principality of Monaco for almost 56 years, making him one of the longest ruling monarchs in European history.
Document 14: Princess Stéphanie of Belgium: Princess Stéphanie of Belgium (21 May 1864 – 23 August 1945) was a Belgian princess by birth and became Crown Princess of Austria through her marriage to the heir-apparent of the Habsburg dynasty, Archduke Rudolf. She was famously widowed in 1889 when Rudolf and his mistress, Mary Vetsera, were found dead in an apparent murder-suicide pact at the Imperial hunting lodge at Mayerling in the Vienna Woods.
Document 15: Charlotte Casiraghi: Charlotte Marie Pomeline Casiraghi (born 3 August 1986) is the second child of Caroline, Princess of Hanover, and Stefano Casiraghi, an Italian industrialist. She is ninth in line to the throne of Monaco. Her maternal grandparents were Rainier III, Prince of Monaco, and American actress Grace Kelly. She is named after her maternal great-grandmother, Princess Charlotte, Duchess of Valentinois.
ground_truth: Elisabeth-Anne de Massy