Dex is of Latin origin, meaning 'right-hand'. It is often used as a short form for Dexter or other names beginning with Dex-, such as Dexterity.
The name Dex experienced varied popularity over time, with peaks in recent years. From 1952 to 1993, births were consistently low, ranging from 5 to 14 per year. However, beginning in 1996, the number of births named Dex started to rise, reaching a peak of 43 in 2016. Since then, it has remained relatively popular, with over 27 births each year until 2022, and reaching 38 in 2023. Overall, there were a total of 608 births named Dex from 1952 to 2023.