Updated June 9, 2019 Share: Boy name origins & meanings English : Defender of mankind Boy name variations Lexi Lexi - 5% this year Neutral Uncommon Find out more Lexie Lexie - 6% this year Neutral Rare Find out more Lexin Lexin 0 % this year Masculine Rare Find out more How Popular Is The Name Lex Family name origins & meanings German and Dutch : from a short form of the personal name Alexius, Alexis.