Apparently an altered form of Scottish McKinley or a reduced
form of Irish (Mc)Quinnelly, Anglicized form of Gaelic Mac
Coingheallaigh or Ó Coingheallaigh ‘son (or descendant)
of Coingheallach’, a personal name meaning ‘faithful to
pledges’.
Dictionary of American Family Names, Oxford University Press, ISBN 0-19-508137-4
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