Surname Кайрис (Kairis 
, Kairys 
, Kayris 
) , in the world, is quite a rare cognomen. The surname Кайрис is characteristic of Lithuania, where it is quite a common surname, Latvia, where it is quite a rare surname, and Greece. Not in comparison with a country's population, it is the most numerous in Lithuania, the United States, and Greece. Much less frequently, Кайрис is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kairis | Germany, Belgium, United States, Greece, Lithuania |
| Kairys | Germany, United Kingdom, Australia, United States, Lithuania |
| Kayris | Bulgaria, United States, France, Brazil, Venezuela |
| Кайрис | Kazakhstan, Russia, Kyrgyzstan, Belarus, Ukraine |
|
кайрис стяпонас Lithuanian politician (1879-1964), LT (b. 1878) |
|
|
юргис кайрис Lithuanian air racer, LT (b. 1952) |
|
| ксаверас костович кайрис LV (b. 1909) |
|
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кайрис, дональдас Lithuanian basketball player, LT (b. 1977) |
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Анна, Сергій, Тамара, Тетяна, Дмитрий, Наталія, Людмила, Олексій, Татьяна, Эдмундас, Геннадий, Владимир, Светлана, Александр, Валентина, Володимир, Сергей, Инесса, Оксана, Любовь, Инна, Иван, Іван, Юлія, Юрий, Антон, Артем, Екатерина, Павел, Иенила, Елена, Ромас, Кирилл, Андрей, Галина, Вацлав, Любов, and Станисловас