Why do some elements have odd abbreviations

Some are normal, like neon being Ne. But can anyone explain the following element's abbreviation origins?

Lead, Pb
Mercury, Hg
Silver, Ag
Gold, Au
Antimony, Sb

Thanks ahead of time!

Lead, Pb (from Latin: plumbum)
Mercury, Hg = hydrargyrum ("hydr-" water & "argyros" silver)
Silver, Ag = from the Latin Argentum
Gold, Au (from Latin: aurum "gold")
Antimony, Sb = Latin: stibium
Potassium, K (from Neo-Latin kalium)
Iron, Fe = Latin ferrum
Tin, Sn = Latin stannum
Sodium,Na (from Latin: natrium)
Tungsten, W = German wolfram

Most often, they are either an abbreviation of the element, like Neon, but others are abbreviated based on who discovered them, where they were first discovered, or a latin word that relates to the element. Hope this helps.

There are two reasons for this:
1. It could have been named after the person who discovered it.
2. It also could be in Latin.

It is because the abreviations are derived from the element's Latin name. (i.e. lead=plumbum or Pb)

it could be from the latin words for those elements