Meaning A boy's name of Russian origin, it means "defender of mankind." Origin of Aleksey Russian , Slavic +-100%Zoom level changed to 1 Popular Middle Names Ryan Pronunciation 🔊 Listen Aleksey Similar Names Aleksei Alecksander Alexei Oleksander Olek Lyaksandro Oleksandr Oleksiy Aleksandar Aleksander Year by Year Popularity of Aleksey