Surname Trigo (Trigo 
, Tigu 
, Riwu 
) , around the world, is a common cognomen. The last name Trigo is characteristic of Portugal, where it is quite a common surname, Bolivia, and Chile. Measured by absolute frequency, it is commonest in Brazil, Argentina, and Portugal. Very seldom, Trigo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Trigo | Brazil, Portugal, Spain, Argentina, Chile |
| Tigu | China, Ethiopia, India, Romania, United States |
| Riwu | Malaysia, China, India, United States, Indonesia |
| Триго | Russia, Kazakhstan |
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adriano augusto trigo Portuguese engineer, PT (b. 1862) |
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felipe trigo Spanish writer, ES (b. 1864) |
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aníbal augusto trigo Portuguese engineer, PT (b. 1865) |
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sandra trigo Argentinian politician, AR (b. 1901) |
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ricardo trigo Argentinian actor, AR (b. 1906) |
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marcelo ostria trigo Bolivian lawyer, columnist and diplomat, BO (b. 1935) |
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julio trigo CU (b. 1925) |
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| mariano trigo Spanish water polo player, ES (b. 1900) |
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herminio trigo aguilar ES (b. 1943) |
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| joan trigo serrano ES (b. 1897) |
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| ciro félix trigo Bolivian lawyer and politician (1915-1967), BO (b. 1915) |
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| manuel trigo díaz ES (b. 1907) |
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| hélio do soveral rodrigues de oliveira trigo Brazilian writer (1918-2001), BR (b. 1918) |
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| mário trigo (b. 1911) |
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óscar trigo Spanish paralympic wheelchair basketball player, ES (b. 1972) |
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