Jefrey is of Hebrew origin, meaning 'Peace'. It is a variant spelling of Jeffrey, which itself is an English form of the medieval French name Geoffroy. This name gained popularity during the Middle Ages due to the influence of French culture on England at that time. Jefrey was also used as a surname in medieval England, often derived from the occupation of a jailer or gaoler.
The name Jeffrey appears to have seen a peak in popularity between the years 1958 and 1967 with a noticeable decline since then, dropping below 10 births per year after 2008. The highest number of babies named Jeffrey was born in 1967 with 20 births that year.