Family name Holaj (Holaj 
) , around the globe, is a very rare cognomen. The surname Holaj is characteristic of Czechia, where it is a rare surname, Poland, where it is a very rare surname, and Australia. Likewise, Holaj is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Holaj | Australia, United States, Czechia, Poland, Germany |
| josef holaj (b. 1913) |
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| josef holaj CZ (b. 1923) |
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| robert holaj researcher ORCID ID = 0000-0002-9488-9706 (b. 1965) |
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