Surname Rosamilia (Rosamilia 
) , globally, is quite a rare last name. The surname Rosamilia is characteristic of Liechtenstein, where it is quite a rare surname, Italy, and Switzerland. In absolute terms, this name is the most popular in Italy, the United States, and Switzerland. Very seldom, Rosamilia is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Rosamilia | Italy, Switzerland, Argentina, Philippines, United States |
| christina andrea rosamilia Swiss actress, CH |
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| lorraine larsen rosamilia researcher (ORCID 0000-0003-3624-8262) |
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| alfonso rosamilia researcher |
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| alex rosamilia musician, US (b. 1982) |
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| emilio rosamilia Italian historian of antiquity (1986-), IT (b. 1986) |
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| valentina rosamilia |
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