Before 14th September 1276 [his father] Hugh Courtenay 3rd Baron Okehampton and [his mother] Eleanor Despencer Baroness Okehampton were married. She by marriage Baroness Okehampton.
On 14th September 1276 Hugh Courtenay 1st or 9th Earl Devon was born to Hugh Courtenay 3rd Baron Okehampton and Eleanor Despencer Baroness Okehampton.
On 28th February 1292 [his father] Hugh Courtenay 3rd Baron Okehampton died at Cullicombe, Devon. Hugh Courtenay 1st or 9th Earl Devon succeeded 4th Baron Okehampton.
Around 28th February 1292 Hugh Courtenay 1st or 9th Earl Devon and Agnes St John Countess Devon were married. She by marriage Baroness Okehampton.
In 1293 [his son] John Courtenay of Tavistock was born to Hugh Courtenay 1st or 9th Earl Devon and [his wife] Agnes St John Countess Devon.
On 22nd July 1298 King Edward I of England defeated the Scottish army led by William Wallace during the 22nd July 1298 Battle of Falkirk at Falkirk using archers to firstly attack the Scottish shiltrons with the heavy cavalry with infantry completing the defeat.
John de Graham and John Stewart of Bonkyll were killed.
The English were described in the Falkirk Roll that lists 111 men with their armorials including:
Guy Beauchamp 10th Earl Warwick.
Walter Beauchamp.
Humphrey Bohun 3rd Earl Hereford 2nd Earl Essex.
Robert Clifford 1st Baron Clifford.
[his uncle] Hugh "Elder" Despencer 1st Earl Winchester.
William Ferrers 1st Baron Ferrers of Groby.
Thomas Berkeley 6th and 1st Baron Berkeley.
Maurice Berkeley 7th and 2nd Baron Berkeley.
[his brother-in-law] Henry Grey 1st Baron Grey of Codnor.
Reginald Grey 1st Baron Grey of Wilton.
John Grey 2nd Baron Grey of Wilton.
Simon Montagu 1st Baron Montagu.
William Ros 1st Baron Ros Helmsley.
John Segrave 2nd Baron Segrave.
Nicholas Segrave.
Robert de Vere 6th Earl of Oxford.
Alan Zouche 1st Baron Zouche Ashby.
Thomas Plantagenet 2nd Earl of Leicester, 2nd Earl Lancaster, Earl of Salisbury and Lincoln.
Henry Plantagenet 3rd Earl of Leicester 3rd Earl Lancaster.
John Warenne 6th Earl of Surrey.
Henry Percy 9th and 1st Baron Percy.
Hugh Courtenay 1st or 9th Earl Devon.
Richard Fitzalan 1st or 8th Earl of Arundel.
Philip Darcy.
Robert Fitzroger.
Robert Fitzwalter 1st Baron Fitzwalter, or possiby a Roger Fitzwalter?.
Aymer de Valence 2nd Earl Pembroke.
John Wake 1st Baron Wake of Liddell, and.
Henry Lacy 4th Earl Lincoln, Earl Salisbury.
William Scrope was knighted.
John Moels 1st Baron Moels fought.
John Lovell 1st Baron Lovel fought.
In 1299 Hugh Courtenay 1st or 9th Earl Devon was created 1st Baron Courtenay. [his wife] Agnes St John Countess Devon by marriage Baroness Courtenay.
On 29th May 1299 John Giffard 1st Baron Giffard Brimpsfield died at his home in Boyton, Wiltshire. [his future brother-in-law] succeeded 2nd Baron Giffard Brimpsfield. [his sister] Aveline Courtenay Baroness Giffard Brimpsfield by marriage Baroness Giffard Brimpsfield.
In July 1300 Robert Clifford 1st Baron Clifford, Hugh Courtenay 1st or 9th Earl Devon, Simon Fraser, John Mohun 1st Baron Dunster and Simon Montagu 1st Baron Montagu fought at Caerlaverock during the Siege of Caerlaverock Castle.
On 12th July 1303 [his son] Hugh Courtenay 2nd or 10th Earl Devon was born to Hugh Courtenay 1st or 9th Earl Devon and [his wife] Agnes St John Countess Devon. He married 11th August 1325 Margaret Bohun Countess Devon, daughter of Humphrey Bohun 4th Earl Hereford 3rd Earl Essex and Princess Elizabeth of Rhuddlan Countess Essex, Hereford and Holland, and had issue.
In or before 1304 [his brother-in-law] John St John 1st Baron St John of Basing and [his sister] Isabel Courtenay Baroness St John of Basing were married. She by marriage Baroness St John of Basing.
In 1309 [his son] Eleanor Courtenay was born to Hugh Courtenay 1st or 9th Earl Devon and [his wife] Agnes St John Countess Devon.
In 1309 [his son] Robert Courtenay was born to Hugh Courtenay 1st or 9th Earl Devon and [his wife] Agnes St John Countess Devon.
On 3rd November 1311 Piers Gaveston 1st Earl Cornwall exiled by "The New Ordinances", a series of regulations imposed upon King Edward II by the peerage and clergy of the Kingdom of England to restrict the power of the English monarch. The twenty-one signatories, consisting of eight earls, seven bishops and six barons, of the Ordinances are referred to as the Lords Ordainers:
Earls:
Henry Lacy 4th Earl Lincoln, Earl Salisbury
Guy Beauchamp 10th Earl Warwick
Gilbert de Clare 8th Earl Gloucester 7th Earl Hertford
Aymer de Valence 2nd Earl Pembroke
Bishops:
Barons:
Hugh de Vere 1st Baron Vere
Hugh Courtenay, Baron of Okehampton.
William Marshal 1st Baron Marshal
Robert Clifford 1st Baron Clifford
Article 20 describes at length the offences committed by Gaveston; he was once more condemned to exile and was to abjure the realm by 1 November.
In 1313 [his daughter] Elizabeth Courtenay Baroness Lisle was born to Hugh Courtenay 1st or 9th Earl Devon and [his wife] Agnes St John Countess Devon. She married in or before 1330 Bartholomew de Lisle 3rd Baron Lisle, son of John de Lisle 2nd Baron Lisle.
In 1315 [his son] Thomas Courtenay was born to Hugh Courtenay 1st or 9th Earl Devon and [his wife] Agnes St John Countess Devon. He married Muriel Moels, daughter of John Moels 4th Baron Moels and Joan Lovel Baroness Maynard, and had issue.
Before 29th January 1316 [his brother-in-law] Nicholas Moels 2nd Baron Moels and [his sister] Margaret Courtenay Baroness Maynard were married. She by marriage Baroness Moels.
On 11th August 1325 Hugh Courtenay 2nd or 10th Earl Devon and Margaret Bohun Countess Devon were married. She the daughter of Humphrey Bohun 4th Earl Hereford 3rd Earl Essex and Princess Elizabeth of Rhuddlan Countess Essex, Hereford and Holland. He the son of Hugh Courtenay 1st or 9th Earl Devon and Agnes St John Countess Devon.
On 27th April 1327 [his sister] Aveline Courtenay Baroness Giffard Brimpsfield died.
In or before 1330 [his son-in-law] Bartholomew de Lisle 3rd Baron Lisle and Elizabeth Courtenay Baroness Lisle were married. She by marriage Baroness Lisle. She the daughter of Hugh Courtenay 1st or 9th Earl Devon and Agnes St John Countess Devon.
In 1330 [his daughter] Elizabeth Courtenay Baroness Lisle died.
On 19th July 1333 King Edward III of England defeated the Scots army at the Battle of Halidon Hill near Berwick-upon-Tweed, Northumberland. John of Eltham 1st Earl Cornwall commanded.
English archers, just as at the Battle of Dupplin Moor one year previously, had a significant impact on the massed ranks of Scottish schiltrons. Edward's army included: Thomas of Brotherton 1st Earl Norfolk, who commanded the right wing, Hugh Courtenay 1st or 9th Earl Devon, Robert Pierrepont, [his son] Hugh Courtenay 2nd or 10th Earl Devon, Henry Beaumont Earl Buchan and John Sully. One of the few English casualties was John Neville who was killed.
The Scottish army included King David II of Scotland. Alexander Bruce, Alan Stewart, James Stewart, John Stewart, William Douglas 1st Earl Atholl, Archibald Douglas who were all killed.
Hugh 4th Earl Ross was killed. William 5th Earl Ross succeeded 5th Earl Ross.
Malcolm Lennox 2nd Earl Lennox was killed. Domhnall Lennox Earl Lennox succeeded Earl Lennox.
Kenneth de Moravia Sutherland 4th Earl Sutherland was killed. William de Moravia Sutherland 5th Earl Sutherland succeeded 5th Earl Sutherland. Johanna Menteith Countess Sutherland by marriage Countess Sutherland.
In 1334 [his son] Robert Courtenay died.
In 1335 Hugh Courtenay 1st or 9th Earl Devon was created 1st Earl Devon. Some regard this as a restoration of the previous Earldom of Devon. [his wife] Agnes St John Countess Devon by marriage Countess Devon.
On 10th May 1335 [his sister] Isabel Courtenay Baroness St John of Basing died at Basing, Hampshire.
Chronicle of Geoffrey le Baker of Swinbroke. Likewise, they showed themselves many times against the Isle of Thanet and Dover and against Folkestone, but in those places they committed little harm, except against poor fishermen. Then, in the ports of Cornwall and Devon, they committed many crimes against fishermen, and set fire to whatever ships they found isolated. At last, in the week of Pentecost [20th May 1339], they suddenly entered the port of Plymouth, setting fire to certain large ships and a large part of the town. Lord Hugh de Courtenay,1 Earl of Devon, a knight of eighty years, confronted them with other knights of that county. After some commoners, unarmed, had fallen under the quarrels of the pirates' crossbows, the knights finally engaged the pirates at close quarters, slew many on land, and drove the rest back to their ships. Many, unable to reach their vessels, were drowned by the sea, up to five hundred, according to those who were present at the time.
Item, contra insulam Tanatis et Doveriam et contra Folkston multocies se ostenderunt, set in illis locis multa mala non fecere, nisi adversus pauperes piscatores. Deinde in portubus Cornubie et Devonie multa mala contra piscatores commisere, et naves quas invenerunt solitarias incendebant; et tandem in ebdomada Pentecosten portum de Plummouthe subito ingréssi, naves quasdam magnas et magnam ville partem ignibus vastabant. Quibus dedit obviam dominus Hugo de Courtenay, comes Devonie, miles octogenarius, cum aliis militibus illius comitatus. Isti, post perdicionem quorumdam popularium qui dearmati quarellis balistariorum occubuerunt, demum piratas cominus aggredientes, multos super aridam mactaverunt, reliquis ad navigia ventilatis, et multos navigio non valentes appropiare mare submersit, ad numerum quingentorum, secundum estimacionem tunc presencium ibidem.
Note 1. Hugh Courtenay 1st or 9th Earl Devon. His age is here a little exaggerated. He was born in 1275/6, became 5th baron Courtenay in 1291, was summoned to parliament 5th February 1299, was created earl of Devon 22nd February 1335, and died before January 1341. As chief commissioner of array for counties. Cornwall, Devon, Somerset, and Dorset, he would take command of the forces which repelled the French attack. See Doyle, Baronage, 1.574.
Other details of the engagement are given in Harley MS. 1729, which was used by Hearne for his Anon. History of Edwardi III. See Adam Murimuth Continuation.
On 23rd December 1340 Hugh Courtenay 1st or 9th Earl Devon died. [his son] Hugh Courtenay 2nd or 10th Earl Devon succeeded 2nd Earl Devon, 5th Baron Okehampton, 2nd Baron Courtenay. [his daughter-in-law] Margaret Bohun Countess Devon by marriage Countess Devon.
On 11th June 1345 [his former wife] Agnes St John Countess Devon died at Exeter, Devon.
NO IMAGEHugh Courtenay 1st or 9th Earl Devon Arms 
Courtenay Arms, a label three points azure. Source.
