Family name Smtih (Smtih 
) , in the entire world, is a rare cognomen. The last name Smtih is habitual in New Zealand, where it is a rare surname, the United States, and Australia. Measured by absolute frequency, it is commonest in the United States, the United Kingdom, and Australia. Very seldom, Smtih is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Smtih | Australia, Canada, New Zealand, United Kingdom, United States |