Cognomen Kasimiro (Kasimiro 
) , across the world, is a very rare surname. The cognomen Kasimiro is habitual in Latvia, where it is a rare surname, South Africa, where it is an extremely rare surname, and Russia. In absolute terms, it is the most numerous in Latvia, Russia, and the United States. Likewise, Kasimiro is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kasimiro | Latvia, South Africa, Russia, Brazil, United States |