1815 J. Scott xiii. 262 The driver of a cabriolet..told me that his horse was a Cossack.
1831 W. Youatt ii. 18 The most celebrated Cossack horses from the Don, the Black Sea, and the Ural.
1926 Sept. 310/1 Our ponies nearly all of them came from England, but some people played Cossacks. I had a capital Cossack pony.