Last name Smoothy (Smoothy 
) , in the world, is a rare cognomen. The surname Smoothy is characteristic of Isle of Man, where it is quite a rare surname, Australia, where it is a rare surname, and the United Kingdom. Measured by absolute frequency, the name is most common in Australia, the United Kingdom, and France.
| VARIANT | COUNTRY |
|---|---|
| Smoothy | United Kingdom, Australia, United States, France, New Zealand |
| derrick smoothy (b. 1923) |
|
|
| tyson smoothy Australian rugby league footballer, AU (b. 1999) |
|
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