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Last name origins & meanings:

  1. French: habitational name from any of various places called Chalm, often recorded as La Champ, in Ardèche, Drôme, Haute-Loire, Isère, Lozère.
  2. Arabic: ethnic name for a Syrian or habitational name for someone from Damascus, from al shām, Arabic name for Syria, used in Syria itself to denote the city of Damascus.
  3. Chinese: variant of Zhan.
  4. Other Southeast Asian: unexplained.