Jonas Slier
Jonas Slier was a Dutch gymnast who competed in the 1908 [Summer Olympics].
Jonas Slier was part of the Dutch gymnastics team, which finished seventh in the Gymnastics at the [1908 Summer Olympics – Men's team|team event]. In the Gymnastics at the [1908 Summer Olympics – Men's all-around|individual all-around competition] he finished 96th. There is no evidence that another Jonas Slier, the uncle of Philip Slier was the athlete mentioned above.