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) with the suffix -ksei.
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%, ▼22.2%). Alexis (#302) is the most trendy boy name in this list. (2014 Birth Statistics)