In the Kingdom of England from the 12th to 15th centuries, a franklin was a member of a certain social class or rank. In the Middle English period, a franklin was simply a freeman; that is, a man who was not a serf. In the feudal system under which people were tied to land which they did not own (or "own directly", etc.), serfs were in bondage to a member of the nobility who owned that land. The surname "Fry", derived from the Old English "frig" ("free born"), indicates a similar social origin.
The meaning of the word "franklin" evolved to mean a freeholder; that is, one who holds title to real property in fee simple. In the 14th and 15th centuries, franklin was "the designation of a class of landowners ranking next below the landed gentry".[1]
With the definite end of feudalism, this social class disappeared as a distinct entity. The legal provisions for "a free man" were applied to the general population. The memory of that class was preserved in the use of "Franklin" as a surname.