The Trubetskoy family (English), Трубецкие (Russian), Трубяцкі (Belarusian), "Trubecki" (Polish), "Trubetsky" (Ruthenian), Трубецький (Ukrainian), "Troubetzkoy" (French), "Trubic" (Croatian), "Trubezkoi" or "Trubetzkoy" (German), is a Russian gentry family of Ruthenian stock and Lithuanian origin, like many other princely houses of Grand Duchy of Lithuania, later prominent in Russian history, science, and arts. They are descended from Algirdas's son Demetrius I Starshy (1327 – 12 August 1399 (the Battle of the Vorskla River)). They used the Pogoń Litewska coat of arms and the Trubetsky coat of arms.