(gold) Jo van Gastel
1920 archery - moving target 28 m, team
(silver) Johannes Kaiser (a.k.a. Jo)
1960 4x400 m relay
(gold) Jenny Kemp (middle name Jo)
1972 swimming - 4x100 m freestyle relay
(gold) Cindy Noble (middle name Jo)
1984 basketball
(silver) Jo Hill
2000 basketball
(silver) Jo-Wilfried Tsonga
2012 tennis
(gold) Jo Aleh
2012 sailing