Kammala jumla mai zuwa: Jan Jacob Kieft (25 ga Janairu 1877, Amsterdam <unk> 2 ga Afrilu 1946, Rotterdam), dan wasan motsa jiki ne dan kasar Holland wanda ya yi gasa a wasannin Olympics na 1908. Kieft ya kasance wani ɓangare na 'yan wasan motsa jiki na Dutch, wanda ya gama na bakwai a gasar
taron ƙungiya. A cikin gasa ta kowane mutum ya gama na 74.