Surname Кай (Kay 
, Kai 
, Kaj ) , worldwide, is a widespread family name. The surname Кай is habitual in Mongolia, where it is a widespread surname, Malaysia, where it is a common surname, and Myanmar (explore the name in all countries). Not in comparison with a country's population, it is commonest in India, Myanmar, and Malaysia. Likewise, Кай is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kay | India, Malaysia, United States, Mongolia, Myanmar |
| Kaj, Kai | India, Malaysia, United States, Germany, Myanmar |
| Кай | Ukraine, Estonia, Kazakhstan, Russia, Kyrgyzstan |
C., Caio, Caiu, Caius, Cajus, Cayo, Cayu, Gai, Gaio, Gaius, Gajo, Gajus, Gayo, Ji, Jì, Kae, Kaio, Kajj, Kajo, Kajs, Kajus, Kei, Khe, Kè, Kāi, Kǎi, Qay, Qi, Qǐ, Ťi, Гай, Гаюс, Каи, Каі, Кей, Кэй, Цзи, גאיוס, קאי, קיי, كاي, জি, かい, カイ, ケイ, 克伊, 凯, 凱, 卡伊, 启, 啓, 啟, 开, 甲斐, 盖乌斯, 計, 计, 開, and 계
|
илья кай RU (b. 1993) |
|
| кай, ольга UA (b. 1982) |
|