Johanna Triebels-Koen
Triebels-Koen was not only interested in the competitive side of swimming, but also in safety. In that era, many Dutch people could not swim and women could not swim at all. In 1889, the Hollandsche Dames Zwemclub started promoting swimming by offering free lessons to (underprivileged) women and girls. In the 1930s her swimming lessons became known undr the slogan "Elke Nederlander Zwemmer" (translated: "Every Dutch swimmer"). In July 1914 Anna Helweg saved a 21-year old maid from drowning in the  in Gorredijk, while male bystanders who couldn't swim did't dare to jump into the water.