She was the eldest of five children (four girls and a boy) and was born in 1768, two years after her parents' marriage, in Paris, where she would live all her life.
[3] According to her sister, Élisabeth, who married Philippe Le Bas of the Committee of General Security, she was "promised" to Maximilien Robespierre, whose political opinions she shared.
[5] Many contemporaries and historians have suggested that she may have been his mistress, including Vilate, a juror on the Revolutionary Tribunal, who said, that Robespierre "lived maritally with the eldest daughter of his hosts", in reference to Éléonore.
Though guilty of no crime, she was imprisoned with her sister Élisabeth and her six-week-old nephew, Philippe Le Bas fils after 9 Thermidor (27 July 1794).
[9] Éléonore Duplay died on 26 July 1832, at the age of 64, and was buried in Père Lachaise Cemetery, where her grave may still be seen in the 34th division.