This is nowhere near complete, but here are a few descendants of the Marquis de Sade (of sadism and "120 Days of Sodom" fame):
(*) Donatien Aldonse François de Sade, the Marquis de Sade, was b.June 2 1740 in Paris and died DEC 2 1814 & interred Charenton cemetery. The author of Justine, Juliette, 120 Days of Sodom, & the man after whom, from of his behavior and writings, the words "Sadistic" and "Sadism" were coined. He m.He m.MAY 17 1763 Lady Renee Pelagie de Montreuil & had issue:
(1) Louis Marie de Sade, b.AUG 27 1767 & d.JUN 9 1809.
(2) Donatien-Claude, Comte de Sade, b.27 JUN 1769 & d.10 MAY 1847. He m.15 SEP 1808 Louise-Gabrielle-Laure de Sade & had issue:
(2.1) Laure-Emilie de Sade, b.16 NOV 1810 & d.25 APR 1875.
She m.13 OCT 1840 Gaston de Graindorge d'Orgeville, Baron du Mesnil-Durand.
(2.2) Alphonse-Ignace de Sade m.Anne-Henriette de Cholet & had issue:
(2.2.1) Hugues-Louis-Charles, Marquis de Sade, b.2 AUG 1845. He m.25 AUG 1877 Marie-Augustine Janson de Couet & had issue:
(126.96.36.199) Bernard, Marquis de Sade, b.7 APR 1891 at Ollainville & d.23 OCT 1933. He m.22 OCT 1917 Jeanne de Sarrazin & had issue:
(188.8.131.52.1) Xavier de Sade, Comte de Sade m.Rose-Marie Meslay (living).
(2.3) Marie-Antoine-Auguste de Sade, b.9 OCT 1819.
He m.8 JUN 1844 Charlotte-Germaine de Maussion & had issue:
(2.3.1) Laure-Marie-Charlotte, b.1859 & d.1936.
She m.6 FEB 1879 Adhéaume, Comte de Chévigné & had issue:
(184.108.40.206) Marie-Thérèse de Chévigné m.Maurice Bischoffsheim & had issue:
(220.127.116.11.1) Marie-Laure Bischoffeim, b.31 OCT 1902 & d.29 JAN 1970. She m.Charles, Vicomte de Noailles
(3) Madeleine Laure de Sade, b.APR 7 1771.
I still have a few gaps. Louise-Gabrielle-Laure de Sade, who married Donatien-Claude, above, is obviously a cousin of some kind, but I do not know how. I also don't know how artist Niki de Saint Phalle, reputed descendant of the Marquis, fits in. Any information would be appreciated.