Jeffrey peaked in 1962 with 979,049 total SSA bearers, placing it among the most common American male names of the 20th century. It is now rank #520. The question is whether Jeffrey is simply aging out of fashion or approaching the point where midcentury names become interesting again.
Germanic Roots, Norman Filter
Jeffrey is an English variant of Geoffrey, which derives from the Germanic elements Godafrid or Walahfrid, combining roots meaning "territory" and "peace." The Normans brought the name to England in 1066 as Geoffroi, which then split into Geoffrey (the formal English form) and Jeffrey (the American popular spelling). The two spellings have separate SSA trajectories; Jeffrey dominated in the U.S. through the mid-20th century. Current rank: #520.
The Jeffrey Generation
Jeffrey is a Boomer name, reaching peak saturation during the same years as Gary, Dennis, and Ronald. That generation is now in their 60s and 70s, which means Jeffrey has saturated the grandparent pool. Grandparent-saturation is usually the first sign that a name might cycle back into use as a heritage choice. The 1960s naming cohort is overdue for the kind of revival that brought back names from the 1920s — a pattern that operates on roughly a 100-year cycle.
Jeff vs. Jeffrey
Jeff remains common as a standalone, breezy and requiring no explanation. Jeffrey, the full form, is where the interest lies if you're thinking about revival. It has a formality that Jeff lacks, which is exactly the quality that makes names feel substantial again after decades of casual use. Compare it with Gerald or Gary, names in a similar arc. Jeffrey may be the first of the 1960s cohort to find its way back, helped by the nickname's enduring currency.