Cognomen Smurthwaite (Smurthwaite 
) , worldwide, is quite a rare family name. The family name Smurthwaite is characteristic of the United Kingdom, where it is a rare surname, Australia, and New Zealand. In absolute terms, it most frequently occurs in the United Kingdom, the United States, and Australia. Much less frequently, Smurthwaite is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Smurthwaite | Australia, Canada, United Kingdom, United States, Malaysia |
| james smurthwaite English county cricketer (1916-1989), GB (b. 1916) |
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| norman smurthwaite Football chairman, GB (b. 1960) |
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| kate smurthwaite British comedian, GB (b. 1975) |
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| carolann smurthwaite American philanthropist |
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