Antonia Happel-Verduijn
Next as a water polo player, Happel-Verduyn was secretary of the Amsterdamsche Dames Zwemclub (A.D.Z.) for many years. She also accompanied swimmers of the club who competed internationally. After a disagreement with the club, she founded in 1929 the club Inter Nos and became the president of the club. She has done a lot for the swimming sport, especially for female youth swimmers. Happel-Verduyn was also for 10 years board member of the Amsterdam rescue brigade. She gave valuable advice on rescue swimming for women.