They had two children: a son, Jean- Dominique Cassini born in 1748, who succeeded his father as Director of the Paris Observatory (and is sometimes known as Cassini IV), and a daughter, Françoise-Elisabeth.
Sila ay may dalawang anak: isang anak na lalaki, Jean-Dominique Cassini ipinanganak sa 1748, na Tagumpay ang kanyang ama bilang Director ng Paris obserbatoryo (at kung minsan ay kilala bilang Cassini IV), at isang anak na babae, Françoise-Elisabeth.