Cognomen Tiatia (Tiatia 
) , all around the world, is a rare last name. The family name Tiatia is habitual in New Zealand, where it is quite a rare surname, the Democratic Republic of the Congo, where it is a rare surname, and Australia. Not in comparison with a country's population, it is commonest in the Democratic Republic of the Congo, Australia, and the United States. Much less frequently, Tiatia is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Tiatia | Democratic Republic of the Congo, United States, Australia, France, New Zealand |
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angela tiatia New Zealand-Australian artist, NZ (b. 1973) |
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| ace tiatia Samoan rugby union player, NZ (b. 1976) |
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| jason tiatia New-Zealand rugby union player, NZ (b. 1979) |
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| angela lagi tiatia NZ (b. 1973) |
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| taumihau tiatia association football player, FR (b. 1991) |
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| chase tiatia New Zealand rugby union player (1995-), NZ (b. 1995) |
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| milo tiatia American Samoan football player, US |
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