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Johan Siemonsma
| Last name | Siemonsma |
| First name | Johan |
| Gender | Male |
| Birthdate | 11.1991 |
| Country | NED |
| 500m | 39,03 (Heerenveen, 04.12.2009) |
| 1.000m | 1.17,58 (Heerenveen, 23.11.2009) |
| 1.500m | 2.00,75 (Heerenveen, 09.02.2010) |
| 3.000m | 4.23,31 (Heerenveen, 18.01.2010) |
| 5.000m | 7.59,29 (Heerenveen, 09.01.2011) |
| Sprint | 77,820 |
| Small Combo | 171,094 |
| Mini Combo | 161,955 |
| Tiny Combo | 118,070 |
| Latest update in | 2011 |
NED