Etymology

McWilliam

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Today it means: A surname. Full definition →

Scottish Gaelic Mac Uilleim
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The story

  1. Scottish Gaelic · derived fromMac Uilleim“son of Uilleam”
  2. English todayMcWilliam

Anglicized form of Irish and Scottish Gaelic Mac Uilleim (“son of Uilleam”), a Gaelicized form of William.

Etymology from Wiktionary, CC BY-SA 4.0.