Dex is a distinctive boys' name in United States, ranking #3510 in 2019 with 32 recorded births. This places Dex in the top 25% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2016 with 43 births ranking #2796. Since 1996, the popularity has increased by 300.0%. In 2019, approximately 1 in every 56,043 boys born was named Dex. FALLING Recent data shows the name is currently falling.