Surname Kerellaj (Kerellaj 
) , all around the world, is a rare family name. The cognomen Kerellaj is characteristic of Kosovo, where it is quite a rare surname, Slovenia, where it is a rare surname, and Switzerland. Measured by absolute frequency, this name is the most popular in Kosovo, Germany, and Slovenia.
| VARIANT | COUNTRY |
|---|---|
| Kerellaj | Switzerland, Slovenia, United States, Kosovo, Germany |