Cognomen Mertha (Mertha 
) , in the world, is quite a rare family name. The family name Mertha is characteristic of Indonesia, where it is a rare surname, Hungary, and Czechia. Not in comparison with a country's population, it is commonest in Indonesia, Germany, and Hungary. Likewise, Mertha is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Mertha | Germany, Indonesia, United States, Hungary, Tanzania |
| rudolf mertha CZ (b. 1882) |
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| arnošt mertha (b. 1897) |
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| richard mertha (b. 1928) |
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| herbert mertha PL (b. 1929) |
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| andrew mertha American political scientist |
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