Family name Grahek (Grahek 
) , worldwide, is a rare cognomen. The surname Grahek is habitual in Slovenia, where it is quite a common surname, Croatia, where it is quite a rare surname, and Austria, where it is a rare surname. In absolute terms, it is commonest in the United States, Slovenia, and Croatia.
| VARIANT | COUNTRY |
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| Grahek | Australia, Croatia, Slovenia, Canada, United States |
| branko grahek (b. 1918) |
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| zvonko grahek SI (b. 1924) |
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| nikola grahek (b. 1949) |
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| shannon grahek researcher |
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| ivan grahek researcher ORCID ID = 0000-0002-9247-5956 |
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| sabina grahek researcher |
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| tatjana marčac-grahek SI |
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| rok grahek SI |
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| kruno grahek |
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| lucija grahek SI |
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| jim grahek American ski jumper, US |
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