Trophime-Gérard, marquis de Lally-Tollendal (5 March 1751 – 11 March 1830) was a French politician.
Born in Paris into an old aristocratic family, he was the legitimized son of Thomas Arthur de Lally, who served as viceroy in India under King Louis XIV, and only discovered the secret of his birth on the day of his father's execution (May 9, 1766), when he devoted himself to clearing his father's memory. He was supported by Voltaire, and in 1778 succeeded in persuading King Louis XVI to annul the decree which had sentenced the Comte de Lally, but the parlement of Rouen, to which the case was referred back, in 1784 again decided in favour of Lally's guilt. The case was retried by other courts, and Lally's innocence was never fully admitted by the French judges.
In 1779 Lally-Tollendal bought the honorary title of Grand bailli of Étampes, and in 1789 was a deputy to the Estates-General for the noblesse of Paris. He played some part in the early stages of the French Revolution, but, as a conservative, quickly rejected more profound changes.
Trophime Gerard Lally-Tollendal was born into an old aristocratic family on March 5, 1751. Although he was the legitimate son of Thomas Arthur Lally, he was kept unaware of his Irish heritage through his bringing up under the name Trophime. He learned of his ancestry the day of his own father's execution on May 9, 1766. After his father's execution, Lally-Tollendal spent most of his adult life fighting to clear his father's name. During this time he attended the College of Harcourt which allowed him to gain the skills needed to not only fight against his father's verdict but participate in French government.