Cognomen Sonsini (Sonsini 
) , around the world, is a rare surname. The surname Sonsini is characteristic of Italy, where it is a rare surname, the United States, where it is a very rare surname, and Australia. Not in comparison with a country's population, it is the most numerous in the United States, Italy, and Brazil.
| VARIANT | COUNTRY |
|---|---|
| Sonsini | Italy, Brazil, United States, Argentina, France |
| larry sonsini American lawyer, US (b. 1942) |
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| john sonsini American artist, US (b. 1950) |
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