Surname Laduca (Laduca 
) , all over the world, is a rare family name. The surname Laduca is habitual in the United States, where it is a rare surname, New Zealand, and Italy, where it is a very rare surname. Not in comparison with a country's population, it most frequently occurs in the United States, Italy, and Canada.
| VARIANT | COUNTRY |
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| Laduca | Italy, Canada, United States, New Zealand, France |
| rob laduca American animator, television producer and television director, US (b. 1956) |
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| charles laduca American lawyer, US (b. 1974) |
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| lauren e laduca researcher (ORCID 0000-0002-3733-7593) |
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| holly laduca researcher (ORCID 0000-0002-3745-9072) |
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| joe laduca college basketball player (1963–1963) Canisius |
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