HSH Prince Louis II (June 26, 1922 - May 9, 1949), b. July 12, 1870, d. May 9, 1949; m. July 24, 1946 Ghislaine Dommanget, b. October 13, 1900, d. April 30, 1991
1. HSH Princess Charlotte, Duchess of Valentinois (daughter by Juliet Louvet), b. September 30, 1898, d. November 15, 1977; m. March 19, 1920 (div. 1933) Comte Pierre de Polignac, b. October 24, 1895, d. November 20, 1964
1.1. HSH Princess Antoinette, Baroness de Massy, b. December 28, 1920, d. March 18, 2011; m. (1) October 21, 1951 (div. 1954) Aleco Noghes, b. June 15, 1916 (1 son; 2 daughters); m. (2) December 2, 1961 (div. 1973) Jean Rey, b. October 14, 1914, d. September 17, 1994; m. (3) July 28, 1983 John Gilpin, b. February 10, 1930, d. September 5, 1983
1.2. HSH Prince Rainier III (May 9, 1949 - April 6, 2005), b. May 31, 1923, d. April 6, 2005; m. April 18/19, 1956 Grace Kelly, b. November 12, 1929, d. September 14, 1982
1.2.1. HSH Princess Caroline, b. January 23, 1957; m. (1) June 28/29, 1978 (div. 1980, annulled 1992) Philippe Junot, b. April 19, 1940; m. (2) December 29, 1983 Stefano Casiraghi, b. September 8, 1960, d. October 3, 1990; m. (3) January 23, 1999 HRH Prince Ernst August of Hanover, b. February 26, 1954
1.2.1.1. Andrea Casiraghi, b. June 8, 1984; m. August 31, 2013(civ)/February 1, 2014(rel) Tatiana Santa Domingo, b. November 24, 1983
1.2.1.1.1. Alexandre (Sacha) Casiraghi, b. March 21, 2013
1.2.1.1.2. India Casiraghi, b. April 12, 2015
1.2.1.1.3. Max Rainier Casiraghi, b. April 19, 2018
1.2.1.2. Charlotte Casiraghi, b. August 3, 1986; m. June 1, 2019 Dimitri Rassam
1.2.1.2.1. Raphael, b. December 17, 2013 [by Gad Elmaleh]
1.2.1.2.2. Balthazar, b. October 23, 2018 [by Dimitri Rassam]
1.2.1.3. Pierre Casiraghi, b. September 5, 1987; m. July 25(civ)/August 1(rel), 2015 Beatrice Borromeo, b. August 18, 1985
1.2.1.3.1. Stefano Ercole Carlo Casiraghi, b. February 28, 2017
1.2.1.3.2. Francesco Carlo Albert Casiraghi, b. May 21, 2018
1.2.1.4. HRH Princess Alexandra of Hanover, b. July 20, 1999
1.2.2. HSH Prince Albert II (April 6, 2005 - ), b. March 14, 1958; m. July 1, 2011 Charlene Wittstock, b. January 25, 1978
1.2.2.1. [by Tamara Rotolo] Jazmin Grace Grimaldi, b. March 4, 1992
1.2.2.2. [by Nicole Coste] Alexandre Coste, b. August 24, 2003
1.2.2.3. HSH Princess Gabriella, b. December 10, 2014
1.2.2.4. HSH Hereditary Prince Jacques, Marquis of Baux, b. December 10, 2014
1.2.3. HSH Princess Stephanie, b. February 1, 1965; m. (1) July 1, 1995 (div. 1996) Daniel Ducruet, b. November 27, 1964; m. (2) September 2003 (div. 2004) Adans Lopez Peres, b. 1975
1.2.3.1. Louis Ducruet, b. November 26, 1992; m. July 26/27, 2019 Marie Hoa Chevallier, b. December 28, 1992
1.2.3.1.1. Victoire Ducruet, b. April 4, 2023
1.2.3.2. Pauline Ducruet, b. May 4, 1994
1.2.3.3. [by Jean Gottlieb] Camille, b. July 15, 1998