Family name Raikerus (Raikerus 
, Райкерус 
) , in all the world, is a very rare last name. The cognomen Raikerus is characteristic of Belarus, where it is a rare surname, Estonia, and Russia, where it is a very rare surname. Measured by absolute frequency, it is commonest in Eastern Europe, particularly Russia, Belarus, and Ukraine.
| VARIANT | COUNTRY |
|---|---|
| Raikerus | Russia, Estonia |
| Райкерус | Russia, Ukraine, Belarus |