Augustin Kubizek
Augustin Kubizek (Vienna, 15 October 1918 - 24 March 2009) was an Austrian choir conductor and composer. He was the oldest son of August Kubizek, who had lodged with Adolf Hitler.
...
Wikipedia
Augustin Kubizek (Vienna, 15 October 1918 - 24 March 2009) was an Austrian choir conductor and composer. He was the oldest son of August Kubizek, who had lodged with Adolf Hitler.