Cadmium
early 19th century: from Latin cadmia ‘calamine’, so named because it is found with calamine in zinc ore. Compare with calamine.
wiktionary
1817, from Ancient Greek Καδμεία(Kadmeía, “ calamine”), a cadmium-bearing mixture of minerals, which was named after the king Κάδμος(Kádmos, “ Cadmus”).
etymonline
cadmium (n.)
bluish-white metallic element, 1822, discovered 1817 by German scientist Friedrich Strohmeyer (1776-1835), coined in Modern Latin from cadmia, a word used by ancient naturalists for various earths and oxides (especially zinc carbonate), from Greek kadmeia (ge) "Cadmean (earth)," from Kadmos "Cadmus," legendary founder of Boeotian Thebes. With metallic element ending -ium. So called because the earth was first found in the vicinity of Thebes (Kadmeioi was an alternative name for "Thebans" since the time of Homer). Its sulphate furnishes a brilliant and permanent yellow color (cadmium-yellow, 1850) used by artists, etc.
