Cognomen Mcjunkin (Mcjunkin 
) , in all the world, is quite a rare surname. The family name Mcjunkin is characteristic of the United States, where it is a rare surname, New Zealand, and Canada, where it is a very rare surname. Not in comparison with a country's population, it most frequently occurs in the United States, Canada, and Australia.
| VARIANT | COUNTRY |
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| Mcjunkin | Australia, Canada, Venezuela, United States, New Zealand |
| joseph mcjunkin American patriot (b. 1755) |
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| daniel mcjunkin American patriot (b. 1756) |
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ebenezer mcjunkin American lawyer, judge and politician, US (b. 1819) |
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george mcjunkin American cowboy and archaeologist, US (b. 1851) |
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| john f. mcjunkin American politician and lawyer, US (b. 1830) |
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katherine mcjunkin Biochemist, researcher |
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| timothy mcjunkin researcher |
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| jonathan mcjunkin researcher |
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