Lex is a distinctive boys' name in England & Wales, ranking #3256 in 2025 with 6 recorded births. This places Lex in the bottom 47% of ranked UK boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2008 with 25 births ranking #1024. In 2025, approximately 1 in every 45,323 boys born was named Lex. FALLING Recent data shows the name is currently falling.