Cognomen Kasemägi (Kasemägi 
) , all around the world, is an extremely rare surname. The cognomen Kasemägi is habitual in Northern Europe, particularly Estonia, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Kasemägi | Estonia |
| robert kasemägi Estonian musician (1919-2015), EE (b. 1919) |
|
|
| kalev kasemägi EE (b. 1934) |
|