Surname Gy (Gy 
, ジー 
, غي 
) , in all the world, is a common last name. The cognomen Gy is characteristic of Myanmar, where it is quite a rare surname, Egypt, and Saudi Arabia. Not in comparison with a country's population, the name is most common in Myanmar, Egypt, and France. Also, Gy is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gy | Egypt, Myanmar, France, Taiwan, China |
| ジー | Japan |
| غي | Saudi Arabia, Yemen |
| chrysologue de gy French astronomer, FR (b. 1728) |
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| marta gy CH (b. 1911) |
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| pierre-marie gy French priest (1922-2004), FR (b. 1922) |
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| pierre gy French chemist, mathematician and statistician (1924-2015), FR (b. 1924) |
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| srinivasa gy researcher |
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| clémentine gy researcher |
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