The name Dex reached its peak in 2016, with 43 registrations (ranked #2796). The name has actually been around since 1952 — over a century — though it took until recently to find its widest audience. Since the peak, the name has eased to well outside the top 1,000 (around #3531) today, averaging about 32 new babies per year. Dex's usage has held roughly steady recently. Across all years on record, approximately 638 American babies have carried this name.