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. <SEP> Antoinette Louise Alberte Suzanne Grimaldi died in Monaco.
Prince Antonio of Monaco, Baron of Massy (Antonio Louis Alberte Simon Grimaldi; 28 December 1920 – 18 March 2011) was a member of the princely family of Monaco and the elder brother of Prince Rainier III and uncle of Albert II, Prince of Monaco. His parents were Count Pierre de Polignac and Princess Charlotte, Duchess of Valentinois. <SEP> Antonio Louis Alberte Simon Grimaldi died in Monaco.