They are descended from Algirdas's son Demetrius I Starshy (1327 – 12 August 1399 (the Battle of the Vorskla River)).- Trubetskoy family
Algirdas' descendants include the Trubetzkoy, Czartoryski and Sanguszko families.- Algirdas
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Dmitry the Older or Dmitry of Bryansk (Dmitrijus Algirdaitis Brianskietis, Dymitr Olgierdowicz, died on 12 August 1399 in the Battle of the Vorskla River) was the second eldest son of Algirdas, the Grand Duke of Lithuania, and his first wife Maria of Vitebsk.
Dmitry's son Michał Trubetsky is considered to be the ancestor of the Trubetskoy family.