The name Jeffrey is a boy's name of German, English origin meaning "pledge of peace". Jeffrey is ranked #323 on our popularity charts and is often added to lists like English Names for Boys and discussed in our forums with posts like "This or That? (Boys)".
From the experts:
The mostly Americanized version of Geoffrey was a trendy mid-century hit, with nickname Jeff the epitome of cool. Jeffrey entered the pop list in 1934 and was a Top 20 name from the mid-fifties to 1978.
There are lots of Jeffrey/Jeff namesakes to reference--Actors Jeff Bridges and Jeff Daniels, writers Jeffrey Archer and Jeffrey Eugenides and race car driver Jeff Gordon.