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The von der Osten-Sackens are from Germanic descent. They lived in Courland (modern Latvia) and included many Barons in the family. The family can trace its ancestors back to Johann (I) (1481-1527) the District President in Piltyn, Courland. His estate was Bahten in Courland. Notable members of the family include: Johann Ernst von der Osten Sacken (1710-1795) Chamberlain in the Polish-Lithuanian Commonwealth; Prince Fabian Gottlieb von der Osten-Sacken (1752-1837), Russian Field Marshall; Countess Osten Sacken (?-1840), aunt of Leo Tolstoy; and Baron Karl-Robert von Osten-Sacken (1828-1906), Russian diplomat and entomologist.