Elizabeth Beaumont was daughter & only heir, of John Beaumont of Ingsdon. They married her to Robert Pomeroy, son of John Pomeroy of Tregony; 2nd son of Baron Sir Edward Pomeroy & his wife Margaret Beville .
Elizabeth was 19 years old, when she was married , Vivian tells us  her father John Beaumont died in 1471 , the year of the Battle of Tewkesbury.
 She received Colsworthy, a sub manor of Ingsdon, as her dowry.
(John Beaumont's name is not in the battle roll for Tewkesbury )  
The Ingsdon Estate, in Ilsington parish, is first recorded in the Domesday Book (1086) where it appears as two manors under different lords. 
There are no known manorial court rolls to help confirm the passage of ownership. Other records, however, many of them unpublished, have enabled this to be done from early times to the present day. Transactions of Devon Association book Ransom. The Owners of Ingsdon, Ilsington Volume 134, 2002, pp. 77–88
Beaumont of Shirwell
The Domesday Book had Chievre ( Cheever) holding numerous lands in Devon, the most interesting of these being the manor of Ingsdon which was later the seat of the Pomeroy family. However as yet I have found no later connections by marriage between these families , at a time when intermarriage between cousins were fairly common for dynastic reasons.
Beaumont, Robert of - Also called Count of Meulan which he became through his mother. Brother of Henry, son of Roger. Earl of Leicester from 1107; died 1118. Robert became close advisor of Henry I.
His twin children, Robert who inherited the title, and Walerun, Count Meulan and later Earl of Worcester were a great influence on King Stephen. Gilbert de Clare was a brother-in-law; their half brother William de Warenne became second Earl of Surrey. Holdings in Leics., Northants., and Warwicks.
Beaumont, Roger of - Probably from Beaument-le-Roger, Eure. Father of Henry and Robert. Entered monastery of St. Pierre, Preaux, 1094-95 having holdings in Dorset & Glos.
COURT OF CHANCERY: Records created, acquired, and inherited by Chancery, and also of the Wardrobe, Royal Household, Exchequer and various commissions 
Division within C  Records of Equity Side: the Six Clerks Court of Chancery: Six Clerks Office: Early Proceedings, Richard II to Philip and Mary 
….John Pomeray the elder, second son of Robert Pomeray. v. John Pomeroy the younger, son of Seyntcler, the elder son of the said Robert.:
 A messuage and land in Ingsdon (Eynkesdon), sometime of Elizabeth Bemond, wife of the said Robert.: Devon.
Chancery Date range: 1518 - 1529. confirmed by C 1/47 CHANCERY PLEADINGS ADDRESSED TO THE BISHOP OF ROCHESTER AS LORD CHANCELLOR.
Robert Pomeroy & Elizabeth his wife, granddaughter of William Beamount. v. Thomas Wise: Lands and tenements: Devon Covering dates 1472- 1475
Robert Pomeroy of Ingsdon Manor ( grandson of Edward Pomeroy and Margaret Bevill) in the parish of Ilsington in Devon. His wife was Elizabeth Beaumont died before her husband after giving  him 2 sons, Sinclair and John Pomeroy .
They settled an entail on  Sinclair Pomeroy on 16 Nov 1481 and the Manor of Ingsdon on themselves until they died & in 1500 they gave  John the property  called Barnes Place in Over Ingsdon ( There is a farm Burns Farm on the Ingsdon estate).  This was probably given to ensure  2nd son John's position & income in the  primogenitor inheritance rules. 2nd son John seems to have married  around that time & his oldest son Hugh was born in 1519.
Its possible that this entail arose from the birth of Henry Pomeroy, the youngest son of Baron Henry born to his second wife Anna Camel in about 1481 at which time Anna seems to have died . Baron Henry died in 7 july 1487, and the orphaned Henry may have gone into the care of his much older half brother, the 3rd son of Baron Henry, Sir Thomas & his wife Agnes Kelloway who already had 2 sons of their own .
Robert Pomeroy  died in 1517  Since his son Sinclere had died before him it was his grandson , John Pomeroy who at the age of 26  inherited the estates  in 1518. 
 Ilsington a large parish in Devon on Dartmoor includes Rippon Tor, Saddle Tor and Haytor extending to Bovey Tracey. Hay Tor quarries are within this parish. Bagtor, Ingsdon , Sigford and Staplehil are all small Domesday manors in this parish. Bagtor was developed into a mansion for John Ford in the dramatists in Henry VIII time.
The Beaumonts from Devon 1424 - 1453 Combe and Gittisham were the inheritance of the Beaumont family who lived in Yolstone in the Parish of Shirwell in north devon near Barnstaple. Whether or not they lived at Combe is unknown. It seems likely that while the head of the family lived at Yolstone, some other member of the family may have lived at Combe.
Pole  tells the tale of William, the eldest son of Sir Thomas Beaumont, who having first passionately courted, and at length married a young Lady of an Honourable House in this County,after a while, when some other fancy possessed him, he left her and went away to London. He lived separate from her two year before  he died. The Lady at first took this very unkindly but she  lived very retired  until, at length, she began to admit that in her husband's absence she had taken a lover &  had a child by that lover, Bodrugan.  When her child was born it was in secrecy but without suspicion.   This child took his name from his putative father , his mother's husband & was named  John Beaumont. However  he was familiarly called John Bodrugan. By the time he was grown up, the Beaumonts were dying out in the male line, and finally when his Uncle Hugh died, there was no apparent heir. 
Both the Basset and the Chichester families laid claim to the Beaumont inheritance, but meanwhile John, whose existence wasn't even suspected, entered upon the Beaumont lands in Gittisham and claimed them as being the lawful son of William Beaumont.   A later Beaumont sold the property to Nicholas Putt. and the family owned the estate from 1614- 1846
However Visitations tell a slightly different tale as to his parentage
 William Beaumont 2nd son of Phillip who was 3rd son of William Beaumont & his wife Isabel Willington. Said William's wife being Blanche Bouchier who after his death 1474 married 2nd Bartholomew St Leger.
SIR THOMAS BEAUMONT, of Cole Orton in Leicestershire inherited the properties of Yolston in North Devon near Barnstaple , Giddesham/Gittisham near Honiton in south east Devon and Lancarpe,(? Lancross ) near Bideford in North Devon and Elworthy in Somerset.
Gittisham near Honiton , Coombe House, built in the 14th C an Elizabethan house – that comprised of a great hall with rooms above for the owner, is set in a beautiful park on the slopes of Gittisham Hill and was probably built by Henry Beaumont who died 1591.
SIR THOMAS BEAUMONT was born at Yate in Gloucestershire 21st September, 1401, and died on Tuesday next after S. Martin the Bishop (17th November), 1460. He held lands at Barnstaple and also a house in London.
At Christmas, 1449 he paid Thomas Pomeroy, prior of the monastery of the Holy Trinity in London forty shillings arrears of Quit rent for a tenement and garden in the parish of S.George, Eastcheap and S. Andrews Hubard.
	By order of Privy Council 14th February 1436 he had to grant a loan of £40 towards the equipment of the army about to be sent to France.
Thomas married before 1428 1st wife was Phillipa daughter of Sir John Dynhvm, the had five children
2nd wife was Alice daughter of' Hugh Stewkley of Aston. They had one son Richard Beaumont who died before his father
http://www.beaumontfamily.com/
John Beaumont 13 December 1550 18 June 1552 Master of the Rolls
The Keeper or Master of the Rolls and Records of the Chancery of England, known as the Master of the Rolls, is the second most senior judge in England and Wales, after the Lord Chief Justice.
In the early part of the thirteenth century, Henry III gave the manor of Aynkesdon, (INGSDON) in Devon to Mathew de Beaumont.
We cannot however trace anything further respecting Matthew.
In the fifteenth century the estate passed by marriage into the Pomeroy family.
The Beaumont Family Web Site (Robert and Richard Beaumont)
Includes the text of Edward T. Beaumont, The Beaumonts in History 850 to 1850 (1929) and extracts from Frederick Salmon Growse, Materials for a history of the parish of Bildeston in the county of Suffolk (1892), both in PDF format. The former includes accounts of the "Beaumont" earls of Leicester, Warwick and Worcester, and branches of the family in Devon (12th century onwards), Lincolnshire (13th century onwards), Yorkshire (12th century onwards), Suffolk and Leicestershire (15th century onwards); the latter relates to the Beaumonts of Hadleigh, 16th century and later.
C19th SHIRWELL is four miles N.E. by N. of Barnstaple, and has 4762 acres of land. Sir Arthur Chichester, Bart, whose Baronetcy was created in 1641, is lord of the manor, and owner of most of the soil, and has a handsome seat here called Youlston Park, which one of his ancestors obtained by marrying the heiress of the Beaumonts, in the reign of Henry VII.
Here is Colsworthy Farm near Liverton about a mile south of Ilsington & part of the Dower of Elizabeth Beaumont. as the only heir of her father John Beaumont
SOURCE The Book of Ilsington Thomas of Engesdon Knight, p 30 -died 18.4.1610, ( who married Barbara Hengscott –was progenitor of the Landrake tree - 4 generations on from Robert Pomeroy and Elizabeth Beaumont)
John Beaumont’s daughter Elizabeth, age 19 in 1471, married Robert Pomeroy who died 3 Jan 1517 Elizabeth Beaumont brought the Ingsdon estate into the Pomeroy family. Part of her dowry was the Manor Colsworthy a sub manor of the Ingsdon estate.
I find it interesting & intriguing to know that there is Pomeroy House in Gittisham English Heritage GV II listed .
Circa late 17th century, remodelled in the early 19th century. Colour washed rendered cob and stone; thatched roof.
Pomeroy House is said to have been built for 2 unmarried sisters of the Putt family at Combe  
Sales blurb about the house says "it is thought to be named after John Pomeroy, who owned the house in 1657. "
GITTISHAM, a small straggling village on a picturesque declivity, near the source of the river Sid, about 3 miles from Ottery St Mary and Honiton, and 14 miles E.N.E. of Exeter, has in its parish 376 souls and 2067A. 2R. 5P. of land, rising in bold hills from the Otter and Sid valleys. The knightly family of De Lumine held the manor in the reign of Henry II., and it afterwards passed to the Willingtons, Beaumonts, and the Putts. It passed from the late Rev. Thos. Putt to the Rev. Henry Wm. Marker, the present lord of the manor, and owner of most of the parish, who has a pleasant seat here called Combe House, a large stone mansion in the Elizabethan style, standing on a commanding eminence in a well-wooded park, overlooking the Otter valley. . . . The Church is an ancient structure, with a tower and three bells, and contains some fine monuments to the Beaumont and Putt families. . . . A parish in East Budleigh Hundred, the Archdeaconry and the Diocese of Exeter.
Pomeroys living in Gittisham from around 1585
Pomerye Jone 1585 Devon Baptisms Gittisham,
Pommerye John of Shute a servant of Mr William (?? ) of Shute  on 15 May 1585  married a widow from Whitford . 
Pomery     Rycharde. 	1591 Baptisms     Gittisham, Devon,
Pomory     Thomas   1590  Burials     Honiton, Devon, 
Pamerye    Thomas  Bb 11 Jun 1598 Gittisham, Devon,   register gives NPN
Pomroy     Thomas  1685  Burials     Gittisham,  
 Pomeroy  William  1601    Marriages     Gittisham, Devon,  
Pomeroy     John    1628      Wills Index, Gittisham, Devon,
Pomery John  1628  Burials Gittisham, Devon,
Pomery     Jone     1600  Devon Burials Gittisham, Devon,
Pomery     Mary   1613   Marriages     Gittisham,  
Pomery     Mary   1633     Devon Wills Index    Gittisham, Devon     Pomerye     William   1601     Devon Marriages     Gittisham, Devon,  Pumery     Marie   1633     Devon Burials     Gittisham, Devon, Eng.. 
Pomeroy     John 1628 Wills Index,  Gittisham, Devon,  
Pomeroy     John 1742    Burials Gittisham, Devon,
Pomeroy     Thomas 1678   Burials     Gittisham, Devon,
Pomeroy     Thoms   1678   Burials     Gittisham, Devon,
Pomeroy     William   1734  Burials     Gittisham, Devon,
Pomroy     Marks 1654      Baptisms     Gittisham, Devon,  
Pomery     Elizabeth 1642  Bapt Gittisham, Devon, Eng 
Pomery     John     1628   Burials     Gittisham, Devon,
Pomery     John 1636  Devon Baptisms Gittisham, Devon,
Pomery     John     1646   Baptisms     Gittisham, Devon,
Pomery     John  1668     Burials     Gittisham, Devon,
Pomery     John 1743   Wills Index Gittisham, Devon,    
Pomery     Jone   1600 Burials     Gittisham, Pomery   Marke    1654    Baptisms  Gittisham, Devon, 
 Pomery     Mary      1613 Marriages     Gittisham, Devon,
 Pomery     Mary 1633    Wills Index   Gittisham, Devon,      
Pomery     Thomas   1641 Baptisms     Gittisham, Devon,  Pomery     Thomas 1648 Baptisms     Gittisham, Devon,  Pomery     William  1639  Baptisms     Gittisham, Devon,  Pomroy     Mary   1684     Burials     Gittisham, Devon,  
Pomroy     Mary   1689    Burials     Gittisham, Devon,  
Pomroy     Thomas  1685 Burials     Gittisham, Devon,  
Pumery     Marie      1633  Burials     Gittisham,  
Pomery     William   1701   Banns of Marriage    Gittisham, Pomery     William     1701 Marriages Gittisham, Devon, Pomery     William     1639 Baptisms     Gittisham, Devon,  Pomery     William     1701   Banns 1538-1915     Gittisham
 Pomery     William     1701  Marriage     Gittisham, 
Pomroy     Mary 1684 Burials Gittisham, Devon, England
Pomroy     Mary 1689  Burials Gittisham, Devon, England
 
source FMP/ IGI NPD- No Parents Named
HONITON is 3 miles from Ottery St Mary and Gittisham & here where there are more ' unattached' Pomeroys
Shute was a delaPole estate
Wikpedia gives us  
 Sir William Pole (1561–1635), the antiquary, who had retired by 1618 to nearby Colcombe Castle, wrote sometime after that date: "My father had the howse (of Shute) and park from Sir William Petre and dwelled there during his leif and left it unto me, and my eldest son John holdeth it from mee".[14]