Family name D'Alfonso (D'Alfonso 
, Dalfonso ) , across the world, is quite a rare surname. The surname D'Alfonso is characteristic of Malta, where it is quite a rare surname, Italy, and Argentina, where it is a rare surname. Not in comparison with a country's population, it most frequently occurs in Italy, the United States, and Argentina. Much less frequently, D'Alfonso is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Dalfonso, D'Alfonso | Italy, Australia, United States, Canada, Argentina |
Alfonso, Д'Альфонсо, and אלפונסו
| nicolò d'alfonso Italian philosopher, educationist and physician (1853-1933), IT (b. 1853) |
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| cesare d'alfonso IT (b. 1886) |
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antonio d'alfonso Canadian writer, CA (b. 1953) |
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luciano d'alfonso Italian politician (1965), IT (b. 1965) |
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| aldo d'alfonso Italian journalist and politician (1925-2005), IT (b. 1925) |
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| giovanni d'alfonso IT (b. 1930) |
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| alfonso d'alfonso Italian politician, IT (b. 1947) |
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| terry d'alfonso US (b. 1942) |
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| bruno d'alfonso Italian comics artist, IT (b. 1953) |
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| matteo d'alfonso (b. 1969) |
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| sandra d'alfonso researcher |
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| timothy m d'alfonso researcher |
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| giuseppe d'alfonso researcher |
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| simon d'alfonso researcher |
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| maria grazia d'alfonso researcher |
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