Maria Von Trapp was from the musical family whose escape from Nazi-occupied Austria was the basis for The Sound of Music. She died at the age of 99 in her home in Vermont. She was the last surviving member of the seven original Trapp Family Singers. Maria was portrayed as Louisa in the film and musical. She was the 3rd child and 2nd oldest daughter of Austrian Naval Capt. Georg von Trapp and his first wife, Agathe Whitehead von Trapp. “The Sound of Music” was based loosely on a 1949 book by von Trapp’s second wife, also Maria von Trapp, who died in 1987.