Surname Mattay (Mattay 
) , throughout the world, is a rare cognomen. The family name Mattay is habitual in Tanzania, where it is a rare surname, Australia, where it is a very rare surname, and Thailand. Measured by absolute frequency, the name is most common in India, Tanzania, and the United States. More prevalently, Mattay is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Mattay | Australia, Thailand, Tanzania, United States, India |
| jochen mattay German chemist, DE (b. 1946) |
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| raghav mattay researcher |
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| venkata s mattay researcher (ORCID 0000-0002-3829-3369) |
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| venkata s mattay |
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