O', O’, O`, , O‘ or may refer to:


  • the anglicized variant of the patronymic term "Ó" in Irish names (like in O'Sullivan)
  • short for "of" or "on" (like in Pot o' Gold, John o' Groats or o'clock)
  • a misspelling of the letter "O" with a diacritic like Ó, Ò, or Ơ.
  • , the twenty-fifth letter of the Uzbek alphabet
  • O′ (with prime symbol) represents the glottalized or creaky vowel "/o̰/" in Taa language
  • ’O or ’o is the masculine singular article in Neapolitan (as in ’O sole mio "my sunshine")

See also

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