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Cognomen Grabchak (Grabchak
) , in all the world, is a very rare surname. The cognomen Grabchak is habitual in Ireland, where it is a rare surname, Bulgaria, and Russia, where it is a very rare surname. In absolute terms, the name is most common in Russia, Bulgaria, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Grabchak | Russia, Bulgaria, United States, Ireland, Ukraine |