Werner von Trapp, a member of the family made famous by the legendary Hollywood film The Sound of Music, has died aged 91 in the US.
Werner von Trapp (L) in 1984 with family including Maria (R)
The film was loosely based on a 1949 book by Mr von Trapp's stepmother Maria and changes some details. He was depicted by the character named Kurt.
Mr von Trapp died on Thursday at his home in Waitsfield, Vermont.
The Sound of Music opened on Broadway in 1959. The Julie Andrews film version in 1965 won five Oscars.
The book by Maria von Trapp tells the story of an Austrian woman who becomes governess to a widower with seven children.
She falls in love with the captain, marries him and then flees with the family from the annexation of Austria by Nazi Germany.
In the film they hike over the mountains to Switzerland although in real life, the family took a train to Italy and then went on to the United States, where they toured successfully as the Trapp Family Singers and later settled in Vermont.
Mr von Trapp, who is survived by three sisters and one brother, was proficient in a number of instruments and as a singer.
He served in Europe with the US Army in World War II.
He was born in 1915 in Zell am See, Austria, as the fourth child and second son of Capt Georg von Trapp and his first wife, Agathe Whitehead.
Maria von Trapp died in 1987.