In the entire world, Mccaslin (Mccaslin 
) is an extremely rare mostly masculine, but infrequently female forename. Much more prevalently, Mccaslin is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Mccaslin | Australia, Germany, Canada, United Kingdom, United States |
| alston jones mccaslin (b. 1863) |
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| ray mccaslin college basketball player (1948–1948) Wichita State |
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| hanna m mccaslin researcher |
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| boyd mccaslin college basketball player (1948–1949) Michigan |
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