I have seen several portraits at Google Search, but it seems some of them are just modified copies of others of dubious origins. Like this seems to be a "manlier" copy of this.

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    Can you expand on "others of dubious origins"? Why are the origins dubious? – Lars Bosteen Jan 29 at 10:56
  • See: Joseph Louis Lagrange (1736-1813), Italian-French mathematician and astronomer. Date: circa 1790 - Image ID: G36NHX – Peter Diehr Jan 29 at 13:42

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