Namesakes
Belgian Prime Ministers:
1 prime minister
Prosper Poullet 1925-1926 
Haitian Presidents:
1 president
(president) Prosper Avril 1988-1990
Notable Artists:
1 cartoonist
Hergé (a.k.a. Prosper) 1907-1983
Notable Athletes:
1 cricket
(cricket) Prosper Utseya 1985-
Notable Scientists and Inventors:
1 physician
Prosper Menière 1799-1862
Notable Writers:
1 author
Prosper Mérimée 1803-1870
Saints:
2 saints
Saint Prosper of Aquitaine 403-463
Saint Prosper of Reggio ?-466