Kammala jumla mai zuwa: Hetty Balkenende (wanda kuma aka rubuta Hettie, an haife shi a 1939) tsohuwar 'yar wasan tsere ce ta tsere da tsere mai daidaitawa daga Netherlands wacce ta lashe lambar azurfa a tseren tsere na 4 × 100 m a gasar Olympics ta Duniya a shekarar
1954 Gasar Wasannin Ruwa ta Turai. A cikin 1955, ta taimaka wa ƙungiyar Dutch don kafa tarihin duniya a cikin wannan taron; ta kuma lashe taken ƙasa guda biyu (100 m da 400 m freestyle), ta karya bayanan ƙasa guda biyu a cikin 400 m freestyle, da kuma tarihin duniya a kan yadi 880 <unk> duk a cikin shekara guda.