Surname Aleksiej (Алексей 
, אלכסיי 
, Аляксей ) , all around the world, is a common cognomen. The last name Aleksiej is characteristic of Kyrgyzstan, where it is quite a common surname, Moldova, and Belarus (explore the name in all countries). Not in comparison with a country's population, it most frequently occurs in Russia, Kyrgyzstan, and Belarus. Much more prevalently, Aleksiej is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Алексей | Kazakhstan, Russia, Kyrgyzstan, Belarus, Ukraine |
| אלכסיי | Israel |
| Аляксей | Russia, Belarus |
| Aleksiej | Poland, Russia, Brazil |
Alaksiej, Aleixo, Alejo, Aleksas, Aleksei, Aleksej, Aleksejs, Aleksejus, Aleksey, Alekseï, Aleksi, Aleksij, Aleksy, Alekszej, Alekséi, Alessio, Alexei, Alexej, Alexey, Alexeï, Alexis, Alexius, Alexéi, Aliaksei, Aliaksiej, Aljaksej, Alyaksey, Oleksa, Oleksi, Oleksii, Oleksij, Oleksiy, Olekszij, Olexa, Olexii, Olexij, Olexiy, Αλέξης, Алексе'Й, Алекси, Алексией, Алексий, Алексис, Алексы, Алексіс, Алесио, Алессио, Алехо, Алёша, Алёшка, Лёха, Лёша, Олекса, Олексий, Олексій, אלכסיס, ألكسي, ألكسيس, أليكسي, اليكسي, الکسی, ალექსი, アレクシ, アレクシス, アレクシー, and アレクセイ