Last name Guglielmetti (Guglielmetti 
) , all around the world, is quite a common cognomen. The surname Guglielmetti is characteristic of Italy, where it is quite a rare surname, Switzerland, and Argentina. In absolute terms, it is commonest in Italy, France, and Argentina. Much less frequently, Guglielmetti is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Guglielmetti | France, Argentina, Italy, United States, Switzerland |
| gaetano guglielmetti (b. 1822) |
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savino guglielmetti gymnast, IT (b. 1911) |
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| augusto guglielmetti IT (b. 1864) |
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| juan guglielmetti UY (b. 1866) |
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| giovanni guglielmetti botanist (1876-1915) (b. 1876) |
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| giulio guglielmetti Swiss politician (1901-1987), CH (b. 1901) |
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| anna-maria guglielmetti IT (b. 1896) |
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| giorgio guglielmetti CH (b. 1923) |
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| matthew guglielmetti American mobster, US (b. 1949) |
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| bruno guglielmetti (1951-2018), CH (b. 1951) |
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| franco guglielmetti Italian musician, IT (b. 1960) |
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| anne guglielmetti FR (b. 1952) |
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| prisca guglielmetti (b. 1957) |
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| christophe guglielmetti French politician, FR (b. 1969) |
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| luca guglielmetti researcher ORCID ID = 0000-0002-7208-5715 |
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