McKinley

From a Scottish surname, an Anglicized form of Mac Fhionnlaigh, from the given name Fionnlagh. A famous bearer of the surname was the American president William McKinley (1843-1901).

As a given name in America, it was mainly masculine in the late 19th century and the majority of the 20th, being most common around the times of the president's election and assassination. During the 1990s it began growing in popularity for girls, probably inspired by other feminine names beginning with Mac or Mc such as Mackenzie and McKenna.