Kammala jumla mai zuwa: Irène "Iet" Maria Jo Arnoldina van Feggelen (20 ga Agusta 1921 <unk> 17 ga Yuli 2012) 'yar wasan tsere ce ta Dutch. Sunan farko a wasu lokuta ana kuskuren rubuta shi a matsayin Let, kuma ana ba da sunan mahaifiyarta sau da yawa kamar Koster<unk>van Feggelen ko Koster saboda aurenta da dan wasan wasan polo na ruwa na Dutch Ko Koster a shekarar 1943. Yaƙin Duniya na II ya hana aikinta, duk da haka ta ci lambobin yabo biyu a 1938 da
1947 Gasar Wasannin Ruwa ta Turai kuma ta kafa tarihin duniya guda goma sha ɗaya tsakanin 1938 da 1947. Bayan ta yi ritaya, ta zama mai horar da 'yan wasa na kasa a cikin wasan motsa jiki da kuma wasan motsa jiki. A shekara ta 2009, an shigar da ita cikin Gidan Wasanni na Duniya.