Hermanus Willem Koekkoek
Hermanus Willem Koekkoek (7 January 1867, Amsterdam – 9 September 1929, Amsterdam)  was a Dutch painter, known for his military scenes. He was part of the famous family of painters, son of Willem Koekkoek and brother of Marinus Adrianus Koekkoek.

He was trained by his father, and lived and worked in Amsterdam, and from 1887 to 1891 and again from 1901 to 1920 in London. 
Many of his paintings are on the subject of the Franco-German War of 1870/1 and the Boer War in South Africa. Preferably, he painted cavalry charges, but also the daily life of soldiers.