Family name Triaca (Triaca 
) , across the world, is a rare last name. The surname Triaca is habitual in Uruguay, where it is quite a rare surname, Switzerland, where it is a rare surname, and Argentina. Measured by absolute frequency, it is the most numerous in Brazil, Argentina, and Italy. Very seldom, Triaca is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Triaca | Uruguay, Argentina, Brazil, Italy, Switzerland |
| albert c. triaca American pioneer (b. 1875) |
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| camillo triaca (1887-1972) restaurateur and sculptor (b. 1887) |
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jorge alberto triaca Argentine trade unionist, AR (b. 1941) |
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jorge triaca Argentinian politician, AR (b. 1974) |
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| walter enrique triaca Argentine chemist, AR |
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| viviana triaca researcher |
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| lívia madeira triaca researcher (ORCID 0000-0001-7192-6554) |
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| ladina triaca Swiss association football player, CH (b. 1992) |
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Mr, Leni, Lino, Liam, Lucy, Luis, Luiz, Jair, Jose, Jone, Jean, Jeff, Juan, Niva, Noel, Eloi, Elza, Edda, Emma, Hugo, Vera, Ilda, Lays, Gary, Rita, Remi, Ms, Ana, Ayu, Leo, Lã, Jim, Evi, Ida, Mara, Sofi, Ivan, Alan, Aida, Acir, Cris, Cruz, Kaua, Raul, Rosa, Rose, Rony, Reni, Aldo, and Iago