Well Objection I don't think anyone is trying to pass off "Cu" or "Ag" as latin for "copper" or "silver." Those are just the elemental symbols from the periodic table for those particular metals, so I don't think your examples are particularly applicable to the point you are making in that regard. Sometimes you know we just don't need heavily-researched, densely-packed, and often awkward-looking entries that require college-level scientific or linguistic knowledge in order to understand (yes I know this statement more or less makes its way into every Name thread, but it needs to). You're free to care about the incorporation of the full latin roots in submissions, though; you'll find plenty of entries like that in this thread to vote for. But try and tone down the condescension toward entries (like mine) that don't try so damn hard to sound "smart" or whatever. Remember this is a CAP Pre-evo name submission thread. Try and have fun with it!
Oh and "Cupwurm" still sounds like "cup worm."
"You may say I'm a dreamer, but I'm not." - John Lennon