About Maria Franziska von Trapp
Maria Agatha Franziska Gobertina 'Mitzi' von Trapp (28 September 1914 – 18 February 2014) was the second-oldest daughter of Georg von Trapp and his first wife, Agathe Whitehead von Trapp. She was a member of the Trapp Family Singers, whose lives inspired the musical and film The Sound of Music. She was portrayed by Heather Menzies as the character "Louisa". She died at age 99, and was the last surviving sibling portrayed in the film. == Biography == She was born on 28 September 1914 in Zell am See, Salzburg, then part of Austria-Hungary. Her siblings were Rupert von Trapp (1911–1992), Agathe von Trapp (1913–2010), Werner von Trapp (1915–2007), Hedwig von Trapp (1917–1972), Johanna von Trapp (1919–1994), and Martina von Trapp (1921–1951). Along with her six siblings, father, and stepmother, Maria Augusta von Trapp, she was part of the Trapp Family Singers, who inspired the 1959 Broadway musical and the 1965 Academy Award-winning Best Picture The Sound of Music. Von Trapp sang second soprano in the choir, together with her sister Martina von Trapp. The family fled Austria after the German annexation of Austria, fearing reprisals resulting from declining to sing at Hitler's birthday party and Georg von Trapp's refusal to accept a commission in Nazi Germany's Kriegsmarine. They emigrated to the United States in 1938, settled in Vermont in 1942, and performed throughout the country.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.