Ok once again its a regional thing.
Silicon was given the name Silicon in 1817 Thomas Thomson.
In 1787, Antoine Lavoisier suspected that silica might be an oxide of a fundamental chemical element,[18] but the chemical affinity of silicon for oxygen is high enough that he had no means to reduce the oxide and isolate the element.[19] After an attempt to isolate silicon in 1808, Sir Humphry Davy proposed the name "silicium" for silicon, from the Latin silex, silicis for flint, and adding the "-ium" ending because he believed it to be a metal.[20] Most other languages use transliterated forms of Davy's name, sometimes adapted to local phonology (e.g. German Silizium, Turkish silisyum, Catalan silici, Armenian Սիլիցիում or Silitzioum). A few others use instead a calque of the Latin root (e.g. Russian кремний, from кремень "flint"; Greek πυρίτιο from πυρ "fire"; Finnish pii from piikivi "flint", Czech křemík from křemen "quartz", "flint").
