Hermanus Willem Koekkoek | |
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| Born | 7 January 1867 |
| Died | 9 September 1929 (aged 62) Amsterdam, Netherlands |
| Occupation(s) | Painter, illustrator, watercolorist |
Hermanus Willem Koekkoek (7 January 1867, Amsterdam – 9 September 1929, Amsterdam) was a Dutch painter, illustrator and watercolorist. He worked in several genres, but is best known for his military art.