Kasdan couldn't help but base his villain on French writer and antisemite Joseph Hilaire Pierre René Belloc
So if he really took a crack
at Indy 4 in 1998, and made it a search for Eden through South America against the rival "Professor Conrad," could he have based such a character on the German botanist Conrad Moench
(1744-1805)? He's a lesser figure than Belloc and would surely have been pulled from some encyclopedia of botanists, just speculatin'.