Cognomen Caughlin (Caughlin 
) , in the entire world, is a rare family name. The last name Caughlin is habitual in Canada, where it is a rare surname, Ireland, and the United States. Measured by absolute frequency, it is commonest in the United States, Canada, and the United Kingdom.
| VARIANT | COUNTRY |
|---|---|
| Caughlin | United Kingdom, Australia, Ireland, United States, Canada |
| ian caughlin British painter, GB (b. 1948) |
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| ian caughlin Peerage person ID=544916 |
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| edward caughlin (born 1980) (b. 1980) |
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| t trevor caughlin researcher (ORCID 0000-0001-6752-2055) |
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| hannah caughlin (born 1982) (b. 1982) |
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