After posting about Forvo yesterday, I put it to the test.
I looked up the lists of French, German and Italian mathematicians included in Wikipedia and added requests to Forvo for all those whose pronunciation I was unsure of.
I arrived home this evening ... after enjoying a nice classical concert in Crows Nest, with my good friends Gavin and Linda ... to discover that twenty of those names now have pronunciations.
That may, in fact, be all of them; I didn't count how many I requested. Anyway, I think that's proof positive that Forvo works!