Kelly is the Anglicised form of the Irish name CEALLACH or the surname derived from it Ó Ceallaigh, which itself means Grandchild of Cealleach. Kelly is the second-most common family name in Ireland, and has become a first name (for females and sometimes also males). Variants of the name include Kelley, Kelli, Kellye, Kellie, Kellog, McCullough, and Cheallaigh.
Famous people whose first name is Kelly include:
- Kelly Clarkson, American singer
- Kelly Osbourne, daughter of Ozzy Osbourne
- Robert Kelly "Rob" Thomas, lead singer of Matchbox Twenty
- Kelly Ripa, American actress and talk show host
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