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Eva Arndt (later Riise, born November 27, 1919 – June 18, 1993) was a Danish backstroke and freestyle swimmer who competed in the 1936 Summer Olympics and in the 1948 Summer Olympics.
She was born in Aarhus and died in Gjesing, Rougsø Municipality.
In 1936 she was a member of the Danish relay team which finished seventh in the 4×100 metre freestyle relay event. In the 100 metre freestyle competition she was eliminated in the first round.
Twelve years later she won the silver medal with the Danish relay team in the 4×100 metre freestyle relay event.