[duffmancd]

I think one of the best counterexamples is The Jabberwocky by Lewis Carroll. If names (and more generally English words) conveyed no meaning on their own and were simply keys in a large fuzzy hash table, the poem would be completely opaque. However, despite the fact that almost every word in it is made-up (new, never a be foreseen keys), I'd argue that most English speakers, after reading the poem, would have a reasonably common understanding of what "slithy" meant or what a "borogrove" was.

If names fit well with what a person already knows, they can aid memory and even impart understanding. If names are poorly chosen they can instead confuse.

[dmit]

Even more impressively, the poem is also sometimes used (untranslated) in classes teaching English as a second language. So you don't need to be a native speaker to intuit the intended meaning.