Anna Helweg
Anna Maria Engelina Dop-Helweg (10 November 1891 – 1 December 1975) was a Dutch competitive swimmer, diver and water polo player. She was a member of the "Hollandsche Dames Zwemclub" (H.D.Z.). Helweg was an active swimmer in the 20th-century. In her era there were (almost) none international competitions and only a limited amount of national competitions.