Family name Гай (Guy 
, Gay 
, Gaj 
, and others...) , in the world, is a widespread last name. The surname Гай is habitual in Israel, where it is a common surname, Monaco, and Saint Vincent and the Grenadines (explore the name in all countries). Measured by absolute frequency, it is the most numerous in China, the United States, and France. More frequently, Гай is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Guy | China, France, Democratic Republic of the Congo, United States, Cameroon |
| Gay | China, France, Canada, Democratic Republic of the Congo, United States |
| Gaj | France, India, United States, United Kingdom, Poland |
| Gai | China, France, Democratic Republic of the Congo, United States, Myanmar |
| Cayo | United Kingdom, France, India, United States, Peru |
| Gaius | France, Democratic Republic of the Congo, United States, Belgium, Cameroon |
| Caius | Israel, France, Canada, United States, United Kingdom |
| Gaio | China, France, United States, Myanmar, United Kingdom |
| Гай | Kazakhstan, Ukraine, Belarus, Armenia, Russia |
Amatuni, C., Cai, Caio, Caiu, Cajus, Cayu, Caïus, Gaios, Gajj, Gajo, Gajs, Gajus, Gajusz, Gaya, Gayo, Gui, Guido, Guidotto, Gvidas, Gvido, Gvidonas, Gwidon, Gwijde, Hai, Haj, Kae, Kaio, Kajo, Kajs, Kajus, Kvido, Lucio, Plinius, Qay, Quido, Гаюс, Гвидо, Гвіда, Гвідо, Ги, Гидо, Гуидо, Гі, Кай, גאי, גאיוס, גווידו, גיא, גידו, קאיו, قاي, ガイ, 凯奥, 吉多, and 盖乌斯
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гай ильич северин Soviet scientist, designer of aviation and space rescue and life support equipment for crew members, RU (b. 1926) |
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гай юлий орловский fantasy author, RU (b. 1939) |
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гай анатолій іванович Ukrainian writer (1952-2021), UA (b. 1952) |
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гай галина семенівна Ukrainian poets, editors, UA (b. 1956) |
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| тагиров, гай хаджиевич Tatar choreographer, RU (b. 1907) |
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| гай, марк исаевич UA (b. 1898) |
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| гай григорьевич асланов Soviet cameraman; front-line cameraman during World War II (1913-1974), RU (b. 1913) |
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| гай, александр дмитриевич Ukrainian actor (1914-2000), UA (b. 1914) |
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| аматуни петроний гай Soviet writer (1916-1982), RU (b. 1916) |
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| гай яків гаврилович Ph.D. Institute of Mathematics of National Academy of Sciences of Ukraine 1965, UA (b. 1926) |
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мирослав александрович гай Ukrainian actor, UA (b. 1982) |
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алексей анатольевич гай Ukrainian footballer, UA (b. 1982) |
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| головинский, гай петрович UA (b. 1926) |
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| гай, давид иосифович Russian writer and journalist (b.1941), RU (b. 1941) |
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| гай, антон анатольевич Ukrainian association football player, UA (b. 1986) |
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Зоя, Ефим, Саша, Таня, Рава, Яків, Ілля, Іван, Інна, Ігор, Юлий, Юлия, Юлія, Юрий, Юрій, Мария, Марія, Марфа, Алиса, Алекс, Аліна, Антон, Иван, Артур, Илья, Ліна, Лев, Сун, Рус, Яна, Юля, Майя, Марк, Алла, Анна, Гуля, Дар'Я, Дина, Діна, Нина, Ніна, Ваня, Вера, Віта, Віра, Леся, Лера, Олег, and Борис