Family name Mattas (Mattas 
) , in the world, is quite a rare cognomen. The surname Mattas is habitual in Estonia, where it is quite a rare surname, Greece, and Finland. Not in comparison with a country's population, it is the most numerous in the United States, Greece, and India. Much less frequently, Mattas is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Mattas | Finland, Greece, India, United States, Argentina |
| karl-julius mattas (b. 1885) |
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| åke mattas Finnish painter (1920-1962), FI (b. 1920) |
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| kajsa mattas Swedish sculptress, SE (b. 1948) |
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| michael mattas CZ (b. 1950) |
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| daniel mattas (b. 1950) |
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| ronny mattas German film editor, DE (b. 1974) |
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| marianne mattas FI (b. 1979) |
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