Mezue ahịrịokwu na-esonụ: Hetty Balkenende (nke a na-akpọkwa Hettie, amụrụ na 1939) bụ onye bụbu onye na-egwu mmiri n'efu na onye na-egwu mmiri n'oge na-adịghị anya site na Netherlands bụ onye meriri ọlaọcha na 4 × 100 m freestyle relay na
1954 European Aquatics Championships. N'afọ 1955, o nyeere ndị otu Dutch aka ịtọ ndekọ ụwa n'otu ihe ahụ; o merikwara aha mba abụọ (100 m na 400 m freestyle), mebiri ndekọ mba abụọ na 400 m freestyle, na ndekọ ụwa na 880 yards <unk> niile n'otu afọ.