McKinley is a surname, usually an anglicization of the Scottish Mac Fhionnlaoich Meaning "son of Fionnlaoch." Fionnlaoch is a personal name derived from fionn "fair-haired; white" + laoch "warrior; hero". It is also found in the form Finlay. As a first name, it became popular for girls in the latter half of the 20th century following on the Mc-name trend (started by Mackenzie) and the US presidential surname trend (Taylor, Tyler, Carter, Kennedy, Reagan etc.).
See Also: Finley

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