Cognomen Gajani (Gajani 
) , all around the world, is a rare family name. The cognomen Gajani is characteristic of Italy, where it is a rare surname, Pakistan, where it is a very rare surname, and Saudi Arabia. Measured by absolute frequency, it is the most numerous in India, Pakistan, and Italy. Likewise, Gajani is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Gajani | Saudi Arabia, Italy, Argentina, India, Pakistan |
| giovanni battista gajani composer (1757-1819) (b. 1757) |
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| guglielmo gajani IT (b. 1819) |
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| egisto gajani FR (b. 1832) |
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| guglielmo gajani Italian association football player (1901-1980), IT (b. 1901) |
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| carlo gajani Italian photographer, painter and engraver, IT (b. 1929) |
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