Dominique François Jean Arago (Catalan: Domènec Francesc Joan Aragó), known simply as François Arago (French: [fʁɑ̃swa aʁaɡo]; Catalan: Francesc Aragó, IPA: [fɾənˈsɛsk əɾəˈɣo]; 26 February 1786 – 2 October 1853), was a French mathematician, physicist, astronomer, freemason, supporter of the Carbonari revolutionaries and politician.
Source : Wikipedia