Lex is a distinctive boys' name in United States, ranking #1849 in 2018 with 82 recorded births. The name reached its all-time peak in 2012 with 94 births ranking #1649. Since 1996, the popularity has increased by 290.5%. In 2018, approximately 1 in every 22,140 boys born was named Lex. FALLING Recent data shows the name is currently falling.