Louis Jules Mancini Mazarini, French poet and diplomat (d. 1798)
Louis-Jules Barbon Mancini-Mazarin, 10th Duke of Nevers (16 December 1716 – 25 February 1798) was a French diplomat and writer.

The Duke was the sixth member elected to occupy seat No. 4 of the Académie française in 1742. In England, he was styled Duke of Nivernois, whilst in Italy, where his family originated they are known as Mancini-Mazzarino.