Family name Laddaga (Laddaga 
) , throughout the world, is a rare last name. The cognomen Laddaga is habitual in Luxembourg, where it is quite a rare surname, Italy, where it is a rare surname, and Argentina. Measured by absolute frequency, it most frequently occurs in Italy, Mexico, and Argentina. Very seldom, Laddaga is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Laddaga | Mexico, Argentina, France, Italy, United States |
| homero laddaga Mexican sports shooter, MX (b. 1941) |
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| reinaldo laddaga Argentine writer, essayist, art critic, AR (b. 1963) |
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| lorenzo laddaga Italian herpetologist |
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| robert laddaga computer scientist |
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| federica laddaga Italian association football player, IT (b. 1987) |
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