Family name Cassimir (Cassimir 
) , in the world, is a rare surname. The surname Cassimir is habitual in Madagascar, where it is a rare surname, Nigeria, where it is an extremely rare surname, and Brazil. Very seldom, Cassimir is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Cassimir | United States, Madagascar, Philippines, Nigeria, Brazil |
| heinrich cassimir (b. 1873) |
|