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Origin: Hebrew

Meaning: a medieval diminutive of John from Jankin or Jackin, the English form of Iohannes, the Latin form of Greek Ioannes deriving from Hebrew Yochanan, a Hebrew masculine name meaning "Yahweh is gracious".

It could also be a short form of Jacqueline, the French feminine form of Jacques which is the French form of Jacob meaning "holder of the heel" or "supplanter".

Jack has also become a generic term for a man, as well as used as a name for Jack Frost, the personification of frost and snow in English folklore.

Nicknames: Jackie/Jacky

  • Jak 
  • Jake 
  • Jacob
  • Jacques (French)

Feminine forms:
  • Jacqueline 
  • Jacquetta