The munitions industry is a strange place. It seems somewhat ironic that the British inventor of the torpedo should have married off his grand-daughter to a man who later used his invention to sink six British ships (and another seven of the Allies).
Georg von Trapp's first wife was Agatha. Agathe was their eldest daughter. He had dual Italian/Austrian nationality, allowing him and his family (by then including nine children with a tenth imminent) to leave German-occupied Austria in 1938. (by train, not on foot...........!). I say "children", but the oldest was 26 (going on 27). The Sound of Music plays very fast and loose with history - basically losing a decade between 1927 and 1938.