Surname Alekseï (Алексей 
, אלכסיי 
, Alekseï 
) , throughout the world, is a common cognomen. The family name Alekseï is habitual in Kyrgyzstan, where it is quite a common surname, Moldova, and Belarus (explore the name in all countries). Measured by absolute frequency, this name is the most popular in Russia, Kyrgyzstan, and Belarus. Predominantly, Alekseï is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Алексей | Ukraine, Kazakhstan, Belarus, Russia, Kyrgyzstan |
| אלכסיי | Israel |
| Alekseï | France |
Alaksiej, Aleixo, Alejo, Aleksas, Aleksei, Aleksej, Aleksejs, Aleksey, Aleksi, Aleksiej, 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, Алексий, Алексис, Алексы, Алексіс, Алесио, Алессио, Алехо, Аляксей, Алёша, Алёшка, Лёха, Лёша, Олекса, Олексий, Олексій, אלכסיס, ألكسيس, أليكسي, اليكسي, ალექსი, アレクシ, アレクシス, アレクシー, and アレクセイ