Last name Leonardelli (Leonardelli 
) , worldwide, is quite a rare surname. The family name Leonardelli is characteristic of San Marino, where it is a common surname, Croatia, where it is quite a rare surname, and Argentina. Not in comparison with a country's population, it most frequently occurs in Argentina, Italy, and Brazil. Much less frequently, Leonardelli is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Leonardelli | Brazil, Italy, Argentina, United States, France |
| annibale leonardelli IT (b. 1623) |
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| bonaventura leonardelli born 1673; died 1757 (b. 1673) |
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caroline leonardelli Canadian musician, CA (b. 1965) |
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| fabrizio leonardelli Italian librarian (1952-), IT (b. 1952) |
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| lucio leonardelli Italian politician, IT (b. 1955) |
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| bernardino leonardelli Sammarinese politician, SM |
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| manuela leonardelli researcher |
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| giovanni antonio leonardelli Sammarinese politician, SM |
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| geoffrey j. leonardelli researcher ORCID ID = 0000-0001-9968-7081 |
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| ottavio leonardelli Sammarinese politician, SM |
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| adrianne leonardelli researcher |
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| julien leonardelli French politician, FR (b. 1987) |
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| teodoro leonardelli SM |
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| pier antonio leonardelli SM |
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