In 1260 Thomas Furnival 1st Baron Furnivall was born to Thomas Furnival.
Before January 1273 Thomas Furnival 1st Baron Furnivall and Joan Despencer Baroness Furnivall were married.
In 1276 [his daughter] Eleanor Furnival Baroness Mauley was born to Thomas Furnival 1st Baron Furnivall and [his wife] Joan Despencer Baroness Furnivall at Worksop, Nottinghamshire. She married before 1300 Piers Mauley 2nd Baron de Mauley, son of Piers Mauley 1st Baron de Mauley and Nicola Gaunt, and had issue.
Before 1286 [his brother-in-law] Hugh "Elder" Despencer 1st Earl Winchester and Isabella Beauchamp were married. She the daughter of William Beauchamp 9th Earl Warwick and Maud Fitzjohn Countess Warwick.
On 12th May 1291 [his father] Thomas Furnival died.
Around 1293 [his daughter] Maud Furnival was born to Thomas Furnival 1st Baron Furnivall and [his wife] Joan Despencer Baroness Furnivall. She married 1. Roger Zouche, son of Alan Zouche 1st Baron Zouche Ashby and Eleanor Segrave 2. after 1313 John Marmion and had issue.
On 24th June 1295 King Edward I of England created new baronies through writs for summons to his 36th Parliament
John Montfort 1st Baron Montfort was created 1st Baron Montfort. Alice Plaunche Baroness Montfort by marriage Baroness Montfort.
Walter Fauconberg 1st Baron Fauconberg was created 1st Baron Fauconberg.
Thomas Furnival 1st Baron Furnivall was created 1st Baron Furnivall. [his wife] Joan Despencer Baroness Furnivall by marriage Baroness Furnivall.
Robert Fitzwalter 1st Baron Fitzwalter was created 1st Baron Fitzwalter. Eleanor Ferrers Baroness Fitzwalter by marriage Baroness Fitzwalter.
Ralph Basset 1st Baron Basset Drayton was created 1st Baron Basset Drayton. Hawise Grey Baroness Basset Drayton by marriage Baroness Basset Drayton.
The following Baronies may have been created at the 36th Parliament or the 37th Parliament summoned on 30th September 1295.
John Wake 1st Baron Wake of Liddell was created 1st Baron Wake of Liddell.
Andrew Astley 1st Baron Astley was created 1st Baron Astley.
Thomas Berkeley 6th and 1st Baron Berkeley was created 1st Baron Berkeley. Joan Ferrers Baroness Berkeley by marriage Baroness Berkeley.
Reginald Grey 1st Baron Grey of Wilton was created 1st Baron Grey of Wilton. Maud Fitzhugh Baroness Grey Wilton by marriage Baroness Grey of Wilton.
John Hastings 13th Baron Abergavenny 1st Baron Hastings was created 1st Baron Hastings by a summons to Parliament. Isabel Valence Baroness Bergavenny Baroness Hastings by marriage Baroness Hastings.
Ralph Neville 1st Baron Neville of Raby was created 1st Baron Neville Raby. Euphemia Clavering Baroness Neville Raby by marriage Baroness Neville Raby.
John Beke 1st Baron Beke was created 1st Baron Beke (although there is some doubt whether he was created Baron).
Fulk Fitzwarin 1st Baron Fitzwarin was created 1st Baron Fitzwarin.
On 24th June 1295 [his brother-in-law] Hugh "Elder" Despencer 1st Earl Winchester was created 1st Baron Despencer with precedence from 24th June 1264. The precedence is based on his being summoned to a Parliament by Simon de Montfort 6th Earl of Leicester 1st Earl Chester, the validity of which is subject to discussion.
Before 1300 [his son-in-law] Piers Mauley 2nd Baron de Mauley and [his daughter] Eleanor Furnival Baroness Mauley were married.
In or before 1301 William Montagu 2nd Baron Montagu and [his future wife] Elizabeth Montfort Baroness Furnivall Baroness Montagu were married.
Before 9th March 1301 seven Earls and 96 Barons signed a letter to the Pope refuting the Pope's claim that Scotland was subject to the Pope's feudal overlordship. The letter was never sent. Those who signed include: John Warenne 6th Earl of Surrey, Thomas Plantagenet 2nd Earl of Leicester, 2nd Earl Lancaster, Earl of Salisbury and Lincoln, Ralph Monthermer 1st Earl of Gloucester and Hertford, Humphrey Bohun 4th Earl Hereford 3rd Earl Essex, Roger Bigod 5th Earl Norfolk, Richard Fitzalan 1st or 8th Earl of Arundel, Guy Beauchamp 10th Earl Warwick, Aymer de Valence 2nd Earl Pembroke, William Leybourne 1st Baron Leybourne, Henry Plantagenet 3rd Earl of Leicester 3rd Earl Lancaster, William Latimer 1st Baron Latimer of Corby, Edmund Hastings, John Hastings 2nd Baron Hastings 14th Baron Abergavenny, Edmund Mortimer 2nd Baron Mortimer of Wigmore, Fulk Fitzwarin 2nd Baron Fitzwarin, Henry Percy 9th and 1st Baron Percy, Robert Fitzwalter 1st Baron Fitzwalter, John Beauchamp 1st Baron Beauchamp Somerset, William de Braose 2nd Baron de Braose 10th Baron Bramber, John Botetort 1st Baron Botetort, Reginald Grey 1st Baron Grey of Wilton, John Moels 1st Baron Moels, Thomas Berkeley 6th and 1st Baron Berkeley, Robert de Vere 5th Earl of Oxford, John Strange 1st Baron Strange Knockin, Thomas Multon 1st Baron Multon, Robert Clifford 1st Baron Clifford, Walter Beauchamp, Alan Zouche 1st Baron Zouche Ashby, John Segrave 2nd Baron Segrave, William Ferrers 1st Baron Ferrers of Groby, Simon Montagu 1st Baron Montagu, Piers Mauley, Ralph Neville 1st Baron Neville of Raby, John Mohun 1st Baron Dunster, Roger Scales 1st Baron Scales, Thomas Furnival 1st Baron Furnivall, Hugh Bardolf 1st Baron Bardolf, Gilbert Talbot 1st Baron Talbot, William Deincourt 2nd Baron Deincourt, Edmund Stafford 1st Baron Stafford, Walter Fauconberg 1st Baron Fauconberg.
After 1313 [his son-in-law] John Marmion and [his daughter] Maud Furnival were married.
In 1316 Simon Montagu 1st Baron Montagu died. William Montagu 2nd Baron Montagu succeeded 2nd Baron Montagu. [his future wife] Elizabeth Montfort Baroness Furnivall Baroness Montagu by marriage Baroness Montagu.
In 1322 [his wife] Joan Despencer Baroness Furnivall died.
Before 8th June 1322 Thomas Furnival 1st Baron Furnivall and Elizabeth Montfort Baroness Furnivall Baroness Montagu were married. She by marriage Baroness Furnivall.
On 3rd February 1332 Thomas Furnival 1st Baron Furnivall died at Sheffield. [his son] Thomas Furnival 2nd Baron Furnivall succeeded 2nd Baron Furnivall. Joan Verdun Baroness Furnivall by marriage Baroness Furnivall.
In August 1345 [his former wife] Elizabeth Montfort Baroness Furnivall Baroness Montagu died. She was buried at Christ Church Cathedral, Oxford.
[his daughter] Katherine Furnival was born to Thomas Furnival 1st Baron Furnivall and Joan Despencer Baroness Furnivall.
[his daughter] Aline Furnival was born to Thomas Furnival 1st Baron Furnivall and Joan Despencer Baroness Furnivall.
[his son] Thomas Furnival 2nd Baron Furnivall was born to Thomas Furnival 1st Baron Furnivall and Joan Despencer Baroness Furnivall. He married Joan Verdun Baroness Furnivall and had issue.