John Bayntun was born in 1407 at Faulston House, in the County of Wiltshire. He was most likely known as John de Benton or Baynton, however we see the spelling of the surname changing to Bayntun from the time the family moved to Bromham around the beginning of the 17th century.

He married his first cousin, once removed, Joan Dudley, who was the daughter of Sir Richard Dudley and his wife Elizabeth Beauchamp, the heiress in issue of the title of her nephew, Richard Lord Saint Amand. Joan Dudley was the granddaughter of Sir John Roche and his wife Wilhelma de la Mare.

When Wilhelma's husband, Sir John Roche, died on the 30th September 1400, his property was divided between his co-heiresses (his daughters), but some of these manors were held in dower by his widow until her death in 1410. In her will, executed in 1411, the following Roche and del la Mare property was conveyed to her grandson, John Bayntun. Wilhelma was the heiress of her father, Robert de la Mare, and had inherited great deal of land, all of which was eventually bequeated to John.

Because John Bayntun was just 4 years old at the time the above agreement was drawn up, Wilhelma gave control of the manors to her eldest daughter, Elizabeth and her husband Sir Walter Beauchamp until such time as John Bayntun reached the age of 21.

The following is the wording of an Indenture, dated 1411:

Indenture between Walter Beauchamp, Knight, party of the first part, and John de Benton, gentleman, party of the second part. Since a controversy has arisen between the aforesaid Walter and his wife Elizabeth, one of the daughters and heirs of John Roche, Knight, and his wife Wilhelma, and John Benton, his kinsman and another heir of the said John and Wilhelma Roche, viz., the son of Joan, daughter of the aforesaid Walter and Wilhelma, concerning about a certain bequeast between the aforesaid Walter and John in the Chancellery of our Lord King Henry IV in the twelfth year of his reign (1411), both about certain lands of the said John Roche and about other lands which belonged to the aforesaid Wilhelma, his wife, concerning which lands the aforesaid Wilhelma [lately died 1410] and concerning the right and title and interest in the Manor of Chyreton (Cherington) in the county of Gloucester and the Manors of Leventon (Lavingon) and Chawe (Shaw) in the county of Wiltshire and the Manors of Haun, Preston, and Tarrant Gundeville in the county of Dorset. Given 6 Henry VI.

By 1428 John Bayntun had become of age and was in possession of the following manors:

THE MANOR OF LAVINGTON
The half manor held by Peter de la Mare circa 1166 is that which came to be called first LAVINGTON BAYNTON and later LAVINGTON DAUNTSEY. It passed from Peter down through the generations to Willelma de la Mare, the wife of Sir John Roche of Bromham, and as a widow she conveyed the manor in 1410 to her daughter Elizabeth, wife of Sir Walter Beauchamp. From Elizabeth and Walter the manor descended like that of Whaddon to John Baynton. In 1541, after the dissolution of the house of Bonhommes at Edington, the manor which had descended from the Rochelles to Edington was granted to Sir Edward and thenceforth the two manors, distinguished by the names of Lavington Baynton or Dauntsey and Lavington Rector, descended together.

THE MANOR OF CHERINGTON
The Manor of Cherington was in the possession of Robert de la Mare in 1201 and descended, along with others, to Wilhelma de la Mare. In the terms of her will she gave control of this manor to her daughter, Elizabeth and upon the death of Lord Saint Amand it descended to John Bayntun.

THE MANOR OF SHAW
Shaw, in the parish of Melksham, was held in 1400 by Sir John Roche and after his death it was held in dower by his relict until her death. From that date it was held in trust by Elizabeth Beauchamp until John became of age.

THE MANOR OF LOWER HEYFORD
Lower Heyford was situated in Oxfordshire was conveyed to Peter de la Mare in 1330 and descended, along with other de la Mare lands, through Wilhelma de la Mare to John Bayntun. It remained Bayntun property until 1533 when John's son, Sir Edward Bayntun, sold it to Corpus Christi College, Oxford for £709.

THE MANOR OF TOLLARD LUCY
In 1392 Sir John Roches was in possession of Tolllard Lucy until his death in 1400. From then it passed to his wife, Wilhelma and in 1428 to John Bayntun.

THE MANOR OF HAUN

THE MANOR OF DELAMERES OR LAMBERDES
Delameres or Lamberdes was a small manor and may have represented lands in Minchinhampton in which Malmesbury Abbey claimed rights in c1234, although it was in the hands of Robert de la Mare in 1259. This was another manor passed onto John by Wilhelma de la Mare.

NEBELS ESTATE AND FARM
Nebels Estate and Farm were in the possession of Robert de la Mare in 1250 and, like the others, were inherited by John Bayntun. But a document shows Nebels Farm in the hands of Sir Henry Long some time before 1556 - which indicates it was most likely sold by John's grandson, Sir Andrew Bayntun.

THE MANOR OF PRESTON
in the County of Dorset

THE MANOR OF TARRANT GUNDEVILLE
in the County of Dorset

THE MANOR OF FAULSTON
The family Manor of Faulston was conveyed to John Bayntun by his mother when she was married for the second time to William Whaplode.

Sir John was an esquire when made Sheriff of Wiltshire (1429 - 1430 and 1443 - 1444). He was knighted in 1434 and until his death, he was a member of a long series of offices in the county as well as being a Member of Parliament for Wiltshire County in 1445 and 1446.

It is not clear in what year Sir John Bayntun died but a collection of deeds transcribed in the 17th century, show him living at Faulston in 25 Henry VI (1447).

There is no record of the burial place of Sir John, but it is thought he and his family before him, may have been buried in a square field, known as Chapel Close, which might have been either the site of a Chapel or a field attached to the Chapel which was next to Faulston House. There are no visible signs of any graves today, unless buried beneath the ground.

When Sir John Bayntun died he was succeeded by his son and heir John Bayntun