Last name Kirklin (Kirklin 
) , worldwide, is quite a rare cognomen. The family name Kirklin is characteristic of the United States, where it is a rare surname, New Zealand, where it is a very rare surname, and Canada. In absolute terms, the name is most common in the United States, Canada, and Venezuela. Very seldom, Kirklin is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Kirklin | United Kingdom, Venezuela, United States, Canada, New Zealand |
| henry kirklin (b. 1858) |
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| byrl r. kirklin American physician, US (b. 1888) |
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| john webster kirklin American surgeon, US (b. 1917) |
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ronald kirklin American Brigadier General |
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| james kirklin American cardiac surgeon, US (b. 1947) |
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| richard kirklin college basketball player (2000–2002) Mississippi |
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| james k kirklin researcher (ORCID 0000-0002-7861-3267) |
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| phyllis a. kirklin |
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