What does Aleksei mean?
Aleksei /alek-sei/ [3 sylls.] as a name for boys is of Greek origin, and the meaning of the name Aleksei is "defender". Aleksei is a version of Alexis (Greek). Compare last name Alessi.
How popular is Aleksei?
Aleksei is an uncommonly occurring first name for men. Aleksei is also an unusual surname for all people. (2000 U.S. Census)
Below is a graphed comparison of the usage of Aleksei and corresponding names. The only prominent alternative form of Aleksei (not ranked) listed in the Top 1000 is Alexis (#302 a year ago). Forms like Aleksi are uncommon. Adoption of this boy name was at its highest in the year 2004 (usage of 0.897%) and is now significantly lower (usage 0.698%, down 22.2%). Alexis (#302) is the most trendy boy name in this list. (2014 Birth Statistics)