Where does “Copperfield” come from?

I can't write this summary because the etymology chain provided contains only repetitive cycling between "cop" and "copper" in English without any older language sources, etymons, or documented origin information. A valid etymology summary requires tracing a word back through actual language stages with supporting evidence. The chain as given doesn't establish how "Copperfield" originated or what linguistic ancestors it derives from. If you have the actual etymological chain for "Copperfield" (for example, whether it's a compound of "copper" + "field," or derives from a place name or surname), I'd be happy to write the summary.