Aleksey is of Russian origin, derived from the Greek name Alexander, which means 'defending men'. It was popularized in Russia by Saint Alexius (Aleksei), a prince who gave up his throne to become a pilgrim in the 15th century. Aleksey is typically pronounced as Ah-LEK-sey.
The name Aleksey experienced a significant surge in popularity between the years of 1995 and 2008, with the number of births increasing from 6 to a peak of 37 in just over a decade. However, since then, there has been a gradual decline in its usage, with only 15 births recorded in 2023.