Complex sentence: Iskandar or Eskandar (اسکندر) is the Arabic and Persian variant of the name Alexander, after Alexander the Great, derived from the original Old Persian variant "Sikandar".
Split into simpler sentences: Iskandar or Eskandar is the given name of Alexander, after Alexander the Great, as perserved by various cultures. The actual name is derived from the original Old Persian variant "Sikandar".