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Last name origins & meanings:

  1. English: variant of Blythe.
  2. Irish: Americanized form of the Connacht name Ó Blighe ‘descendant of Blighe’, a personal name probably derived from the Old Norse byname Blígr (from blígja ‘to gaze’).
  3. Cornish: nickname from Cornish blyth ‘wolf’. Compare Blethen.