Last name Trías (Trías 
, Триас 
) , all over the world, is a rare cognomen. The last name Trías is characteristic of Uruguay, where it is quite a rare surname, Spain, where it is a very rare surname, and Kyrgyzstan. Measured by absolute frequency, the name is most common in Uruguay, Spain, and Venezuela. Much less frequently, Trías is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Trías | Uruguay, Mexico, Spain, Venezuela, Argentina |
| Триас | Kyrgyzstan |
| ángel trías Mexican military personnel, MX (b. 1809) |
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mariano trías Vice President First Philippine Republic (1868-1914), PH (b. 1868) |
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juan de dios trías ES (b. 1859) |
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helen rodríguez trías American pediatrician and activist (1929–2001), US (b. 1929) |
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| julio c. abella trías Uruguayan writer, UY (b. 1909) |
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eduardo trías Spanish cultural manager, ES (b. 1961) |
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| josé torras trías Spanish politician, ES (b. 1920) |
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| vivian trías Uruguayan teacher and politician (1922-1980), UY (b. 1922) |
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| antonio simonetti trías Uruguayan writer, UY (b. 1936) |
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| silvia trías Uruguayan writer, UY (b. 1941) |
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| emeterio custiel trías UY (b. 1938) |
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| ivonne trías Uruguayan journalist, UY (b. 1950) |
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| cristina aguilar trías Uruguayan writer, UY (b. 1952) |
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| héctor d. custiel trías UY (b. 1949) |
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| claudio b. lescano trías UY (b. 1950) |
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May, Silvia, Sofía, Alirio, Alvaro, Carlos, Daniel, Lorena, Javier, Teresa, Isabel, Mariana, Marcelo, Silvana, Solange, Alberto, Andrés, Adriana, Cecilia, Claudia, Cynthia, Richard, Miguel, María, Marcos, Yamir, Luis, Joan, Juan, Maria, Marta, Molly, Saulo, Paula, Pablo, Pedro, Ricardo, Pilar, Diana, Diego, Laura, José, Jorge, Norma, Elena, Inés, Oriol, Oscar, René, and Daniela