Maria Franziska von Trapp

Austrian-American singer from a noted family, as 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 1959 Broadway musical and the 1965 Academy Award-winning Best Picture The Sound of Music. In the film 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.

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. 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. Baron von Trapp died in 1947. Maria Franziska became a naturalized U.S. citizen in 1948 and lived at her family's lodge in Stowe, Vermont. The family continued to tour until their last concert on 26 January 1956, at which time Maria Franziska and her stepmother became lay missionaries in Papua New Guinea where Maria Franziska adopted a son, Kikuli Mwanukuzi.

From 22 July 2008 to 27 July 2008, she visited her childhood home in Salzburg/Aigen and her birthplace in Zell am See. Accompanying her were her half-brother Johannes and her sister-in-law Erika (Werner's widow). During their visit, the group met with Ernst Florian Winter, the husband of her sister Johanna (1919–1994).

She was the last survivor of the seven original von Trapp children.