Pierre-Marie Dioudonnat (French pronunciation: [pjɛʁ maʁi djudɔna]; born 24 March 1945[1]) is a French publisher, historian and political scientist.[2]
Trained in prosopography, he specialises in family history. His name is closely associated with the Encyclopédie de la fausse noblesse et de la noblesse d'apparence, republished in 2002 and 2010 as Le Simili-nobiliaire français, which gathers data on 6,000 surviving French families whose present-day surname links to a false title of nobility.