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- Callum McKay
- Charles McKay
- Charles Mackay (1814–1899), British poet and journalist
- Charles MacKay (US arts administrator), American arts administrator
- Cheryl McKay
- Christopher McKay (planetary scientist)
- Clan McKay
- Clarence Mackay (1874–1938), an American financier
- Claude McKay
- Clinton McKay
- Cody McKay
- Colin McKay
- Craig McKay (disambiguation) (several people)
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