Dee ihe na-aga n'ihu maka paragraf a - Ronald Kroon (17 Septemba 1942, Amsterdam <unk> 12 Julaị 2001, Huizen) bụ onye Dutch na-egwu mmiri na-egwu mmiri nke meriri ọla nchara abụọ na 1962 European Aquatics Championships
Ọ dị mma. Ọ sonyekwara na 1960 na 1964 Summer Olympics na ihe kachasị mma nke 8th ebe na 4 × 100 mita medley relay. N'agbata afọ 1960 na 1964 ọ bụ onye mmeri mba ugboro anọ ma setịpụkwa ihe ndekọ mba 12 na ihe omume 100 m freestyle. Ọ bụ onye egwuregwu Dutch mbụ gbagara mita 100 n'ime sekọnd 55.