Neanderthal (adj.) Look up Neanderthal at Dictionary.com
1861, in reference to a type of extinct hominid, from German Neanderthal "Neander Valley," name of a gorge near Düsseldorf where humanoid fossils were identified in 1856. The place name is from the Graecized form of Joachim Neumann (literally "new man," Greek *neo-ander), 1650-1680, German pastor, poet and hymn-writer, who made this a favorite spot in the 1670s. Adopting a classical form of one's surname was a common practice among educated Germans in this era. As a noun, by 1915; as a type f a big, brutish, stupid person from 1926.