McQuaid, McQuade, Mac Uaid A Gaelic surname meaning ‘son of Wat (a pet form of Walter)’. A sept of Monaghan whose origin is obscure. Also see Watt. In 1890 McQuaid was principally found in Monaghan and Fermanagh, McQuade in Antrim, and the estimated number of bearers was 2,465 (all variants). In the United States McQuade is the 9.801st most numerous surname with an estimated 2,750 bearers.
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