(gold) Irene Steer
1912 swimming - 4x100 m freestyle relay
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(silver/gold) Irene Guest
1920 swimming - 100 m freestyle; swimming - 4x100 m freestyle relay
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(bronze) Irene MacDonald
1956 diving - springboard
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(bronze) Martha Randall (a.k.a. Irene)
1964 swimming - 400 m medley
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(bronze) Irene de Kok
1992 judo
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(bronze) Irene Montrucchio
2012 synchronized swimming - team
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