Meaning & History
From a surname, an Anglicized form of Gaelic Mac Amhalghaidh meaning "son of Amhalghadh", itself a given name of unknown meaning. A famous bearer of the surname was Thomas Babington Macaulay (1800-1861), a British Whig politician and noted historian. The given name is borne by the American former child actor Macaulay Culkin (1980-), who was named after the British politician.
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