Around the world, Mcwilliams (Mcwilliams 
) is a very rare principally masculine, but very infrequently girly first name. The forename Mcwilliams is characteristic of Northern America, particularly the United States, where it is an extremely rare dominantly masculine, but uncommonly girly name. Much more prevalently, Mcwilliams is the last name as well as the forename.
| VARIANT | COUNTRY |
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| Mcwilliams | Australia, Canada, Ireland, United Kingdom, United States |
Macwilliams, and Mcwıllıams
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carey mcwilliams American journalist, non-fiction writer, US (b. 1905) |
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| wilson carey mcwilliams American academic (1933-2005), US (b. 1933) |
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| tennant s. mcwilliams (b. 1943) |
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| carey mcwilliams American hunter and writer, US (b. 1973) |
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| chandler mcwilliams American artist |
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| nairn anthony mcwilliams Ph.D. University of Edinburgh 2011 |
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| weldon mcwilliams college basketball player (1999–2002) Hampton; Stony Brook |
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| taylor mcwilliams |
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