no. 2
Camille Jordan (1838-1922) painted in 1858 by his uncle Pierre Puvis de Chavanne
Revue d'histoire des mathématiques, Tome 17 (2011) no. 2, p. 272 
@article{RHM_2011__17_2_272_0,
     author = {Puvis de Chavanne, Pierre},
     title = {Camille {Jordan} (1838-1922) painted in 1858 by his uncle {Pierre} {Puvis} de {Chavanne}},
     journal = {Revue d'histoire des math\'ematiques},
     pages = {272--272},
     year = {2011},
     publisher = {Soci\'et\'e math\'ematique de France},
     volume = {17},
     number = {2},
     language = {en},
     url = {https://www.numdam.org/item/RHM_2011__17_2_272_0/}
}
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Puvis de Chavanne, Pierre. Camille Jordan (1838-1922) painted in 1858 by his uncle Pierre Puvis de Chavanne. Revue d'histoire des mathématiques, Tome 17 (2011) no. 2, p. 272. https://www.numdam.org/item/RHM_2011__17_2_272_0/