Last name Guarniz (Guarniz 
) , in the world, is quite a common surname. The surname Guarniz is characteristic of Peru, where it is quite a common surname, Chile, where it is a rare surname, and Spain, where it is a very rare surname. Very seldom, Guarniz is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Guarniz | Spain, Chile, United States, Argentina, Peru |
| capitán guarniz Mexican comedian, MX (b. 1974) |
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| william antonio sagástegui guarniz researcher, PE |
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