Cognomen Kotwall (Kotwall 
) , in all the world, is a rare last name. The family name Kotwall is habitual in Afghanistan, where it is a rare surname, Canada, where it is a very rare surname, and Australia. Not in comparison with a country's population, it is commonest in Afghanistan, India, and Canada.
| VARIANT | COUNTRY |
|---|---|
| Kotwall | Australia, United States, Afghanistan, India, Canada |