Surname Maclauchlan (Maclauchlan 
) , globally, is a rare cognomen. The last name Maclauchlan is habitual in Canada, where it is a rare surname, the United Kingdom, and New Zealand, where it is a very rare surname. Measured by absolute frequency, it is commonest in the United States, the United Kingdom, and Canada.
| VARIANT | COUNTRY |
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| Maclauchlan | United Kingdom, South Africa, United States, Canada, New Zealand |
| margaret maclauchlan Scottish covenanter/ Wigtown martyr, GB (b. 1621) |
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| henry maclauchlan Surveyor, GB (b. 1792) |
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| thomas maclauchlan Maclauchlan, Thomas (1816–1886), Free Church of Scotland minister and Gaelic scholar (b. 1816) |
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| adam v. maclauchlan professor of clinical family medicine |
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| elizabeth maclauchlan Peerage person ID=559343 |
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| susan maclauchlan researcher ORCID ID = 0000-0001-9689-0826 |
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