Kammala jumla mai zuwa: Johannes Jacobus Posthumus (24 Satumba 1887 a Gouda <unk> 12 Disamba 1978 a Utrecht) dan wasan motsa jiki ne dan kasar Holland wanda ya yi gasa a wasannin Olympics na 1908. Ya kasance wani bangare 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 66.