Complex sentence: Flaugergues was born in Viviers, the son of magistrate Antoine-Dominique Flaugergues, whose family were originally from Rouergue, and Jean-Marie-Louise de Ratte, of a family of Montpellier gentry and sister of mathematician Étienne-Hyacinthe de Ratte.
Split into simpler sentences: Flaugergues was born in Viviers, the son of magistrate Antoine-Dominique Flaugergues, whose family originated from Rouergue. His mother was Jean-Marie-Louise de Ratte, of a family of Montpellier gentry and the sister of mathematician Étienne-Hyacinthe de Ratte.