The following archaic names for elements are the origin of the accepted symbol even though the name in common usage has changed. In some instances the original name is still used in some languages: i.e. Kalium in German.
Archaic Name Symbol Modern Name
Argentium Ag Silver.
Aurum Au Gold.
Ferrum Fe Iron.
Hydrargium Hg Mercury.
Kalium K Potassium.
Natrium Na Sodium.
Plumbum Pb Lead.
Stannum Sn Tin.
Stibium Sb Antimony.
Wolfram W Tungsten.