The Purefoy family lived in and around Misterton a small village on the Roman road, known as Watling Street, in the County of Leicestershire. Looking at Misterton today from Google Earth shows a patch work of farm fields in greens and browns, almost in the center of England. The River Swift runs just to it's north. Across Watling Street and slightly south is Churchover, another small farming village where the family held land. Churchover is in County Warwickshire. The family lands remained concentrated in and around the Leicestershire/Warwickshire border area.
The period of time in which these people lived is known as the Late Middle Ages (1300-1500). After a period of prosperity and growth England was facing drought and famine and by 1350 their world would be decimated by the Bubonic Plague, known as the Black Death.
The Purefoy's daily life was centered around two essential and intertwined calendars, the agricultural and ecclesiastical calendars that marked their year. Michaelmas, 29 September, was the feast day of St. Michael the Archangel. This day marked the beginning and ending of the husbandman's year. Many legal documents were dated using a feast day as a reference. Today we have to look up the date of the feast day on wikipedia but the medieval Purefoys were intimately acquainted with the many feast days that made up their year.
The first Purefoy ancestor that can be identified with certainty was one William. In 1337 William was named in a land transaction in which two brothers; John de Shirford and his wife Ellen and Simon de Shirford, vicar of Nuneaton and brother to John, conveyed a moiety of Churchover to William and his son Philip. Philip was married to John and Simon's sister Margaret de Shirford. Her sister was Katherine de Shirford Knythcote. In 1343 Katherine made over her rights in the moiety of the manor of Churchover to Philip Purefoy and her sister Margaret. The Purefoys would hold this manor until 1566. 
William was the largest taxpayer in Churchover in 1332 and his descendants were presented to the living of Churchover until the dissolution of the monasteries. William's wife's name is unknown to us as are any children other than Philip. Also note that the name, at least as far as he is concerned was Purefoy not "de Purefoy". The 'de' was used, but back in 1277. If William of the 1329 deed was our Willliam, then he held a tenement at Misterton from Robert Napton.  A tenement, using our modern definition is a run down, squaid apartment block, but in medieval times the word only referred to any abode or place of habitation. It had no reflection on the quality or desirability of the house.
The father/son relationship between William 1 and Philip is well established in the contemporary records, a rare thing. Philip seems to have married Margaret de Shirford the sister of John and Simon de Shirford. Their marriage occurred by 1343. Philip's birth can then be estimated as 1320 or earlier. The land in Churchover which was given to Philip Purefoy could well have been part of Margaret's dowry. In 1348 Philip was named in a land deed for a messuage and nine acres of land in Misterston. He bought the land from John and Joan Koc (Cock) of Walcote in Misterton for 20 marks of silver. 
In the year 1201, during the reign of King John, the English government began keeping a record called the Patent Rolls. These rolls were an administrative record of appointments to commissions, grants, pardons, privileges, etc. Commissions of peace were made to men of good standing in their communities. They could investigate crimes, settle disputes, put offenders in jail and keep the peace for their county. Philip was commissioned several times for the county of Warwickshire.
In 1368 Philip was commissioned, with others, to investigate the claims by the monks at the Abbey of Stoneleigh in Warwickshire, some twenty four miles from Churchover. The Abbot claimed that 'divers men' were stealing their oxen, cows, sheep, vestments, chalices and jewels. The men had ruined the woods and making it hard for the monks to survive. In 1374 Philip and his son William were witnesses in a civil case.  Philip is said to have had some training in the law and was the steward to Ralph, Earl of Stafford and held his courts for him.
Philip's second son was Thomas. He was trained as a lawyer and a member of the Middle Temple, one of the four Inn's of Court. He is said to have been on the council of Richard Beauchamp, Earl of Warwick, one of the most powerful men of his time. Thomas was very successful. He bought the manor of Fenny Drayton where his family lived until 1706 when a less than successful Purefoy was forced to sell the manor.
William was probably born right around the time of the black plague by 1350, by the time of his maturity around 1370 the world was a very different place. The glorious reign of King Edward III was in it's final years. The Hundred Years War was well underway, the Black Prince was dead and tumultuous reign of his grandson, Richard II was about to begin. But the Black Death brought benefits to the survivors. Men married at an earlier age. Landless men could obtain the land of their brothers, cousins, neighbors or others who had died. Men could fill civil roles that had been done by others; take on new roles to improved their status. Despite the undeniable horror of the Black Death, those who survived reaped some benefit for the 'reset' of their world.
William seems to have been a quite successful man. In 1385 he was granted the reversion of 12 messuages and 13 virgates of land in Cesters over and Cosford. It had been held by held by John Paraunt and Clemence his wife.  His mother Margaret must have passed away by 1393 when his right to his share of the manor of Shirford in Barton Hastings was recognized. William served on multiple commissions, again in the County of Warwickshire.
William's rise in status is evident in his ability to contract a marriage of his heir to the daughter of a knight. The family had risen to the top of the peasant pile and was crossing over into the sphere of the upper class. Again, this was made easier by the Black Death. Merchant and wealthy peasant families were able to join the lower tier of the aristocracy through acquisition of property, service to the king or great lord or through an advantageous marriage. 
In 1391, according to Dugdales Warwickshire, William was granted licensed to have an oratory (private chapel) in his house at Shirford. This license was granted by Richard Scrope, teh Bishop of Coventry and Litchfield.
In 1397 William's father, William 2, covenanted with Aliva, the widow of Sir William Chetwynd, that his son, another William, would marry her daughter Margaret. The covenant was drawn up on the Feast of Barthlomew in the year 21 Richard II, (24 August 1397). The wedding would occur before the feast of Exaltation of the Holy Cross, 14 September.  The bride and groom would have been acquainted prior to the covenant. The dower would have been negotiated and agreed upon. Once their commitment to marriage was made known it is practically a slam dunk. The couple could even engage in you know what and were often pregnant by the time they arrived at the church door. The exchange of vows would take place outside on the church porch. The vows were almost identical to what couples say today. The wedding was followed by a feast. Then as now, on to real life.
William continued to improve the families fortunes. His name is found on the Patent Rolls multiple times as he was commissioned like his father and grandfather. By 1400 life was getting a bit easier. Houses were more substantial. Roofs were made of tile or shale. The door was framed and windows were made. Houses now have two distinct rooms and some have an upstairs! The central hearth was replaced by a chimney so no more smokey fire in the middle of the room. Life was good!
In 1415 or so, William contracted a marriage for his son William 4. The boy was only about 12 years old but, what the heck. The future father in law was Alan Ayete. He vested the Manor of Shalstone in trustees, including William Purefoy. The trustees would pay Alan Ayete 20 marks of silver a year. The manor of Shalstone would go to William Purefoy 4 and his wife Margery, daughter of Alan Ayete upon his death. The family would hold Shalstone for many years. 
Based on his parents marriage, William was likely born around 1400. He was contracted in marriage at a fairly young age. by 1432 his name was entering the records. He had inherited his grandfather's land in Cester Over and shared over lordship with John Waver. In 1434 an oath was given in all the counties of England. The men taking the oath were the leading men of the county and they swore 'not to maintain peacebreakers.' William Purefoy, Esq. of Shirford was among the men of Warwickshire taking the oath. Notice the esquire attached to his name, William was a Gentleman.  His name appeared on a land deed, not for him but for other men, but it is also written esquire.
In 1430 the English had captured Joan of Arc and burnt her at the stake in 1431. Later that year, the English King Henry VI was crowned King of France in Paris in a lavish ceremony that caused a financial crisis in England. Trouble was always just around the corner. In 1448 William reached the height of his career and was High Sheriff of both Warwickshire and Leicestershire.  The sheriff was the principal law enforcement officer in the county. His last entry into the public record was in 1455 when he stood surety (mainpernor) for Sir William Peyto of Warwickshire, who was accused of assaulting a neighbor.
In a document written in 6 Edward IV (1467) Philip Purefoy son of William was 24 said to be years old. It was first believe that he could not have been the son of William and Marion Ayot, therefore he must have been the son of a William 5. It is now believed that he he was the son of William Purefoy 4 and his second wife Margery Moton. In 1464 William sold the manor of Foxcote to Thomas Waldeve. William died in 1466, the first confirmed death of a Purefoy. An IPM of his estate stated that he held no land in Warwickshire. He must have divested his estate to his sons or possible sons-in-law.
The manor of Misterton passed out of the family at this time when William and Margery deeded it to Sir William Fielding. Sir William was the son of Sir John Fielding and his wife Margaret Purefoy, daughter of William. 
philip (not an ancestor)
|Baddesley Clinton by Steve Daniel|
Yeah! Finally a different name. John succeeded his brother Philip in 1468. This was a dangerous time in England. Edward IV (Yorkist) had taken the throne from his cousin Henry VI (Lancastrian) in 1461. Henry's wife Margaret of Anjou wanted it back. This was the War of the Roses. In 1470 Margaret and her forces over threw Edward for one year, he returned in 1471 to reclaim the throne after winning at the Battle of Tewksbury. Sir William Fielding was killed at Tewksbury fighting for King Henry. In 1485 the Battle of Bosworth at which Henry VII defeated King Richard III took place only twenty of so miles from Misterton.
In 1472 John's sister in law, Isabel married John Denton. He granted to them the manor of Shirford which his family had held since early in the previous century. John died young, by 1491, leaving a son Nicholas. John's wife is unknown.
Because Nicholas' father died while he was still a minor, he was given to a guardian to 'safe guard' his estate and manage it for him until he reached his majority. In 1491 Nicholas of Daventry, was made the ward of John Denton, the man who had married Isabel Purefoy. Daventry is about 16 miles to the south of Misterton. There seems to have been a master plan at work here as Nicholas married Alice Denton, the daughter of John Denton and Isabel Purefoy Denton. Thus, keeping the manor of Shirford in the family.
Nicolas was married in 1494 as evidenced by the birth of his son Edward. He must have reached his majority by 1493, so he was born by 1470 or thereabouts. He was living at Etfield in Leicstershire at the time. I cannot find an Etfield on the map, so I am not sure where this was. In 1507 Nicholas and Alice leased Shirford. It was finally sold in 1545 to Sir Walter Smythe. Sir Walter was murdered by his wife Dorothy who was the daughter of Thomas Chetwynd of Ingestre. 
Nicholas was married twice more after Alice. His second wife was Clemence Lydiard the widow of _____Byrde. His third wife who outlived him was Katherine Brayfield. Nicholas died on 18 Feb 1547. 
The family was of Shalstone in Buckinghamshire thereafter.
Edward born on the cusp of a new century and a new dynasty, the Tudors. The future Henry VIII was born in 1491 and would succeed his father in 1509. The golden age of England was upon them. Edward married Anne Fettiplace of Shirford. She was born on 16 July 1496. Edward died in 1558. Their daughter, Mary Purefoy, married Thomas Thorne.
 F. N. Craig, Maternal Ancestry of Governor Thomas Dudley: Purefoy, Ayot, and Denton Lines, The New England Historic and Genealogical Register, Vol. 142 (July 1988) 227-244
 "Parishes: Churchover," in A History of the County of Warwick: Volume 6, Knightlow Hundred, ed. L F Salzman (London: Victoria County History, 1951), 62-64. British History Online, accessed April 27, 2016, http://www.british-history.ac.uk/vch/warks/vol6/pp62-64.
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 medieval genealogy feet of fines
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 "Parishes: Burton Hastings," A History of the County of Warwick: Volume 6, Knightlow Hundred, ed. L F Salzman (London: Victoria County History, 1951), 57-61. British History Online, accessed May 14, 2016, http://www.british-history.ac.uk/vch/warks/vol6/pp57-61.
 Douglas Richardson, Plantagenet Ancestry: A Study In Colonial And Medieval Families, 2nd Edition, 2011 Ancestry. page 96.