John Gerrard Keulemans | |
|---|---|
 J. G. Keulemans | |
| Born | 8 June 1842 Rotterdam, Netherlands |
| Died | 29 March 1912 (aged 69) Ilford, England |
| Nationality | Dutch |
| Known for | Natural history illustration |
Johannes Gerardus Keulemans (8 June 1842 – 29 March 1912) was a Dutch bird illustrator. For most of his life he lived and worked in England, illustrating many of the best-known ornithology books of the nineteenth century.