General Prologue Terms (Definitions From Dictionary.Com)

squire:  A young nobleman attendant upon a knight and ranked next below a knight in feudal hierarchy.
yeoman: A farmer who cultivates his own land, especially a member of a former class of small freeholders in England.
prioress: A nun in charge of a priory or ranking next below the abbess of an abbey.
friar: A brother or member of any religious order, but especially of one of the four mendicant orders, viz: (a) Minors, Gray Friars, or Franciscans. (b) Augustines. (c) Dominicans or Black Friars. (d) White Friars or Carmelites.
franklin: A medieval English freeholder of nonnoble birth holding extensive property.
Epicurus: Greek philosopher who believed that the world is a random combination of atoms and that pleasure is the highest good (341-270 BC).
haberdasher:
A dealer in men's furnishings; A dealer in small wares, as tapes, pins, needles, and thread; also, a hatter.
parson:
A person who represents a parish in its ecclesiastical and corporate capacities; hence, the rector or incumbent of a parochial church, who has full possession of all the rights thereof, with the cure of souls.
reeve:
A bailiff or steward of a manor in the later medieval period; A high officer of local administration appointed by the Anglo-Saxon kings.
miller: One who works in, operates, or owns a mill, especially a grain mill.
summoner: An inferior parish officer in England having a variety of duties, as the preservation of order in church service, the chastisement of petty offenders, etc.
pardoner: a medieval preacher delegated to raise money for religious works by soliciting offerings and granting indulgences.
manciple: A steward or purchaser of provisions, as for a monastery or college.