Jan Justus "Jan-Just" Bos (28 July 1939 – 24 March 2003) was a Dutch botanist, television presenter, and rower who competed in the 1960 and 1964 Summer Olympics.Bos (Dutch for "forest") studied forestry at the Wageningen University. While a student in Wageningen, he was the coxwain of the Dutch coxed pair, which was eliminated in the repechage at the 1960 Olympics.