Françoise-Marie LeRoy was the mother of Émilie Louise Marie Françoise Joséphine Pellapra.
Her husband was Henri (de) Pellapra, a rich financer.
This would have had to have been the result of an affair with her mother at the time of a stay by Napoleon in Lyon.
This claim was that an affair took place in April 1805, whilst Napoleon was on the way to Italy to be crowned.
However, no stay in this city at that time seems to have taken place and, according to several authors (in particular André Gavoty in the Bulletin de l'Institut Napoleon April 1950), Napoleon only met LeRoy in 1810.