Baldwin de Redvers, 7th Earl of Devon
Baldwin de Redvers, 7th Earl of Devon( 1 January 1236 – 1262), feudal baron of Plympton in Devon and Lord of the Isle of Wight, was the son of Baldwin de Redvers, 6th Earl of Devon and Amice de Clare, daughter of Gilbert de Clare, 5th Earl of Hertford.
He succeeded his father at the age of ten.
He died in the expedition of Henry III of England to France in 1262; the record of his death by the royal clerks was made on 13 September.
He was succeeded by his sister, Isabella de Fortibus, widow of William de Forz, 4th Earl of Albemarle.
Isabel de Forz, suo jure 8th Countess of Devon
Isabel de Forz or Isabel de Redvers( July 1237 – 10 November 1293) was the eldest daughter of Baldwin de Redvers, 6th Earl of Devon( 1217 – 1245).
On the death of her brother Baldwin de Redvers, 7th Earl of Devon in 1262, without children, she inherited" suo jure"( in her own right) the earldom and also the feudal barony of Plympton in Devon, and the Lordship of the Isle of Wight.
After the early death of her husband and her brother, before she was thirty years old, she inherited their estates and became one of the richest women in England, living mainly in Carisbrooke Castle on the Isle of Wight, which she held from the king as tenant- in- chief.
She had six children, all of whom died before her.
On her death bed she was persuaded to sell the Isle of Wight to King Edward I, in a transaction that has ever since been considered questionable.
Her heir to the feudal barony of Plympton was her cousin Hugh de Courtenay( 1276 – 1340), feudal baron of Okehampton, Devon, who in 1335 was declared Earl of Devon.
Countess Wear, now a suburb of Exeter, is named after a weir that she built on the River Exe, and she is the subject of several legends and traditions.
Baldwin de Redvers, 6th Earl of Devon
Baldwin de Redvers, 6th Earl of Devon( 1217 – 15 February 1245), feudal baron of Plympton in Devon and Lord of the Isle of Wight, was the son of Baldwin de Redvers and Margaret FitzGerold and grandson of William de Redvers, 5th Earl of Devon.
Thomas Courtenay, 6th/14th Earl of Devon
Thomas Courtenay, 6th/14th Earl of Devon (1432 – 3 April 1461), was the eldest son of Thomas de Courtenay, 5th/13th Earl of Devon, by his wife Margaret Beaufort, the daughter of John Beaufort, 1st Earl of Somerset, and Margaret Holland, daughter of Thomas Holland, 2nd Earl of Kent.
Through his mother he was a great great-grandson of King Edward III.
The ordinal number given to the early Courtenay Earls of Devon depends on whether the earldom is deemed a new creation by the letters patent granted 22 February 1334/5 or whether it is deemed a restitution of the old dignity of the de Redvers family.
Authorities differ in their opinions, and thus alternative ordinal numbers exist, given here.
Baldwin de Redvers, 1st Earl of Devon
Baldwin de Redvers, 1st Earl of Devon (died 4 June 1155), feudal baron of Plympton in Devon, was the son of Richard de Redvers and his wife Adeline Peverel.
He was one of the first to rebel against King Stephen, and was the only first rank magnate never to accept the new king.
He seized Exeter, and was a pirate out of Carisbrooke, but he was driven out of England to Anjou, where he joined the Empress Matilda.
She made him Earl of Devon after she established herself in England, probably in early 1141.
He founded several monasteries, notably those of Quarr Abbey (1131), in the Isle of Wight, a priory at Breamore, Hampshire, and the Priory of St James, at Exeter.
Some monastic chronicles call his father also Earl of Devon, but no contemporary record uses the title, including the monastic charters.
Maud de Lacy, Countess of Hertford and Gloucester
Maud de Lacy,( 25 January 1223 – 10 March 1289), was an English noblewoman, being the eldest child of John de Lacy, 2nd Earl of Lincoln, and the wife of Richard de Clare, 5th Earl of Hertford, 6th Earl of Gloucester.
Richard de Redvers, 2nd Earl of Devon
Richard de Redvers, 2nd Earl of Devon (died 1162) was Earl of Devon from 1155 until his death and was feudal baron of Plympton in Devon.
He married Denise, one of the daughters and coheiresses of Reginald, Earl of Cornwall.
He was High Sheriff of Devon from 1154–1157.
He was the son of Baldwin de Redvers, 1st Earl of Devon and brother of William de Reviers, 5th Earl of Devon.
He was succeeded by his son Baldwin de Redvers, 3rd Earl of Devon (died 1188).
Richard de Redvers, 4th Earl of Devon
Richard de Redvers, 4th Earl of Devon( died 1193) was Earl of Devon from 1188 until his death and was feudal baron of Plympton in Devon.
He inherited the title on the death of his elder brother Baldwin de Redvers, 3rd Earl of Devon, who died childless.
On his own death without issue the title passed to his uncle, William de Redvers, 5th Earl of Devon, third but only surviving son of the 1st Earl.
Hugh de Courtenay, 1st/9th Earl of Devon
Hugh de Courtenay, 1st/ 9th Earl of Devon( 14 September 1276 – 23 December 1340) was the son of Sir Hugh de Courtenay( died 1292), feudal baron of Okehampton in Devon, by his wife Eleanor le Despenser( died 1328), sister of Hugh le Despenser, 1st Earl of Winchester.
Forty- one years after the death of Isabel de Redvers," suo jure" 8th Countess of Devon( died 1293)( eldest daughter of Baldwin de Redvers, 6th Earl of Devon), letters patent were granted by King Edward III of England, dated 22 February 1335, declaring him Earl of Devon, and stating that he' should assume such title and style as his ancestors, Earls of Devon, had wont to do so'.
This thus made him 1st Earl of Devon, if the letters patent are deemed to have created a new peerage, otherwise 9th Earl of Devon, if it is deemed a restitution of the old dignity of the de Redvers family, and he is deemed to have succeeded the" suo jure" 8th Countess of Devon, his second- cousin once removed.
Authorities differ in their opinions, and thus alternative ordinal numbers exist for this Courtenay earldom.
Baldwin de Redvers, 3rd Earl of Devon
Baldwin de Redvers, 3rd Earl of Devon( c. 1160–1188) was Earl of Devon from 1162 until his death and was feudal baron of Plympton in Devon.
His birth is not attested; but he had a younger brother, and he was invested with the Earldom between the Pipe Rolls of 1185 and 1186, so he should not have been much over twenty- one.
He married Denise the heiress of Raoul, Prince of Déols, lord of Châteauroux and Charenton- du- Cher.
After his death, she married André de Chauvigny.
He was succeeded by his brother, Richard de Redvers, 4th Earl of Devon.

Question: Where did Richard De Redvers, 2Nd Earl Of Devon's father die?
Answer: Quarr Abbey