Worldwide, Guelfi (Guelfi 
) is a very rare epicene forename. The forename Guelfi is habitual in Southern Europe, particularly Italy, where it is a very rare epicene name. Predominantly, Guelfi is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Guelfi | Brazil, Italy, France, Australia, Argentina |
| little john guelfi Italian singer and composer, IT (b. 1970) |
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| romano guelfi |
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