Cognomen Kniffin (Kniffin 
) , all around the world, is a rare surname. The family name Kniffin is habitual in the United States, where it is a rare surname, New Zealand, and Belgium, where it is a very rare surname. In absolute terms, this name is the most popular in the United States, Mexico, and Belgium.
| VARIANT | COUNTRY |
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| Kniffin | Belgium, Mexico, United States, Canada, New Zealand |
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frank c. kniffin American politician (1894-1968), US (b. 1894) |
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| harry anable kniffin American author, US (b. 1876) |
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| chuck kniffin baseball player and coach, US (b. 1950) |
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| mahdah r. kniffin Art collector and philanthropist |
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| dick kniffin college basketball player (1961–1961) Bucknell |
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| kevin m kniffin researcher (ORCID 0000-0002-2272-7919) |
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