Irène "Iet" Maria Jo Arnoldina van Feggelen (20 August 1921 – 17 July 2012) was a Dutch backstroke swimmer.

The forthcoming World War II effectively canceled her Olympic ambitions; nevertheless, she devoted herself to swimming.

On 13 February 1938 she set her first world record and shortly after won a silver medal in the 100 m backstroke at the 1938 European Aquatics Championships, behind another Dutch swimmer Cor Kint.

[2] During the war, played some water polo and continued swimming, winning the national 100 m backstroke titles in 1941–1943.

After 1938, her career spiked again in 1947, when within one week of April–May she set two world records in medley relay events, and shortly after won a bronze medal at the 1947 European Aquatics Championships in the 100 m backstroke.