"Koniuszy" was a position of nobility known in Kingdom of Poland since 11th century and in Grand Duchy of Lithuania since 15th. Koniuszy was in charge of stables and herds of Grand Dukes and Kings; in fact, a podkoniuszy, subordinated to koniuszy was in a more immediate charge. Since 17th century there existed a number of governmenal positions, such as "Koniuszy Wielki Litewski" (Grand Equerry of Lithuania), "Koniuszy Litewski" (Equerry of Lithuania), etc. For example, a number of nobles of Radziwill family held the positions of "koniuszy".
Konyushy in early Russia
Konyushy was a boyar in charge of stables of Russian rulers. It was a high title at the court of Russian rulers until the 17th century.
By the end of the 15th century a special Equerry Office (конюшенный приказ, "konyushenny prikaz") was introduced, headed by the Konyushy. It was in charge of Tsar's stables, Tsar's parade equipage, ceremonies of court ride-offs, and military horse breeding. At some time Boris Godunov was konyushy.
The Equerry Office handled a significant amount of Tsar's treasures, related to harness and horse/horseman armor, which were transferred to the Armoury (Kremlin) in 1736.
In 1500 he defeated Lithuanians at the Lovat River and captured the city of Toropets.
-1514), konyushy at court of Vasili III of Russia, voyevoda (1508-1509).
He took part in a number of battles with Grand Duchy of Lithuania, after defeat of Russia at the Battle of Orsha he was taken into captivity and died in a prison in Wilno.