Biography of Juliana Leybourne Countess Huntingdon 1303-1367
In or before 1303 [her father] Thomas Leybourne and [her mother] Alice Tosny were married.
In 1303 Juliana Leybourne Countess Huntingdon was born to Thomas Leybourne and Alice Tosny.
Around 1304 [her daughter] Katherine Hastings Baroness Stafford was born to [her future husband] John Hastings 2nd Baron Hastings 14th Baron Bergavenny (age 17) and Juliana Leybourne Countess Huntingdon (age 1) at Chebsey, Staffordshire [Map].
In 1307 [her father] Thomas Leybourne died.
Around 1310 Robert Clinton 1st Baron Clinton (age 52) died. His son [her future brother-in-law] John Clinton 2nd Baron Clinton (age 10) succeeded 2nd Baron Clinton.
On 28 Feb 1313 John Hastings 13th Baron Bergavenny 1st Baron Hastings (age 50) died. His son [her future husband] John Hastings 2nd Baron Hastings 14th Baron Bergavenny (age 26) succeeded 2nd Baron Hastings, 14th Baron Bergavenny Feudal Creation.
Before 1317 Roger Grey 1st Baron Grey Ruthyn (age 27) and [her future sister-in-law] Elizabeth Hastings Baroness Grey Ruthyn (age 21) were married. They were fourth cousins.
Before 20 Mar 1319 John Hastings 2nd Baron Hastings 14th Baron Bergavenny (age 32) and Juliana Leybourne Countess Huntingdon (age 16) were married. She by marriage Baroness Hastings.
On 20 Mar 1319 [her son] Laurence Hastings 1st Earl Pembroke was born to [her husband] John Hastings 2nd Baron Hastings 14th Baron Bergavenny (age 32) and Juliana Leybourne Countess Huntingdon (age 16) at Allesbury.
On 20 Jan 1325 [her husband] John Hastings 2nd Baron Hastings 14th Baron Bergavenny (age 38) died. His son [her son] Laurence Hastings 1st Earl Pembroke (age 5) succeeded 3rd Baron Hastings, 14th Baron Bergavenny Feudal Creation.
After 20 Jan 1325 Thomas Blount 1st Baron Blount (age 62) and Juliana Leybourne Countess Huntingdon (age 22) were married. The difference in their ages was 40 years.
Around 1326 [her son-in-law] Ralph Stafford 1st Earl Stafford (age 24) and [her daughter] Katherine Hastings Baroness Stafford (age 22) were married. She by marriage Baroness Stafford. She the daughter of John Hastings 2nd Baron Hastings 14th Baron Bergavenny and Juliana Leybourne Countess Huntingdon (age 23).
On 31 May 1328 the Mortimer family leveraged their new status at a lavish ceremony that celebrated the marriages of two of Roger Mortimer's (age 41) daughters at Hereford [Map].
Edward Plantagenet (age 8) and Beatrice Mortimer (age 6) were married. She the daughter of Roger Mortimer 1st Earl March (age 41) and Joan Geneville Baroness Mortimer 2nd Baroness Geneville (age 42). He the son of Thomas of Brotherton 1st Earl Norfolk (age 27) and Alice Hales Countess Norfolk. They were half third cousin once removed. He a grandson of King Edward "Longshanks" I of England. She a great x 4 granddaughter of King John "Lackland" of England. 
[her son] Laurence Hastings 1st Earl Pembroke (age 9) and [her daughter-in-law] Agnes Mortimer Countess of Pembroke (age 11) were married. She the daughter of Roger Mortimer 1st Earl March (age 41) and Joan Geneville Baroness Mortimer 2nd Baroness Geneville (age 42). He the son of John Hastings 2nd Baron Hastings 14th Baron Bergavenny and Juliana Leybourne Countess Huntingdon (age 25). They were third cousin once removed. She a great x 4 granddaughter of King John "Lackland" of England.
King Edward III of England (age 15) and his mother Isabella of France Queen Consort England (age 33) attended as well as Roger Mortimer 1st Earl March (age 41).
After 13 Aug 1328 William Clinton 1st Earl Huntingdon (age 24) and Juliana Leybourne Countess Huntingdon (age 25) were married. He a great x 3 grandson of King Henry "Curtmantle" II of England.
On 17 Aug 1328 [her husband] Thomas Blount 1st Baron Blount (age 65) died.
Before 24 Feb 1329 [her brother-in-law] John Clinton 2nd Baron Clinton (age 29) and Margery Corbet (age 25) were married. He a great x 3 grandson of King Henry "Curtmantle" II of England.
On 01 Feb 1335 [her brother-in-law] John Clinton 2nd Baron Clinton (age 35) died. His son John Clinton 3rd Baron Clinton (age 8) succeeded 3rd Baron Clinton.
On 06 Jul 1336 [her daughter] Katherine Hastings Baroness Stafford (age 32) died at Stafford, Staffordshire [Map].
On 16 Mar 1337 [her husband] William Clinton 1st Earl Huntingdon (age 33) was created 1st Earl Huntingdon. Juliana Leybourne Countess Huntingdon (age 34) by marriage Countess Huntingdon.
After 1343 [her brother-in-law] John Clinton 2nd Baron Clinton and Isabella Beauchamp (age 36) were married. She the illegitmate daughter of Guy Beauchamp 10th Earl Warwick. They were fourth cousins. He a great x 3 grandson of King Henry "Curtmantle" II of England. 
On 29 Jul 1347 [her former brother-in-law] Hugh Hastings (age 37) died at Elsing, Norfolk.
On 06 Mar 1352 [her former sister-in-law] Elizabeth Hastings Baroness Grey Ruthyn (age 57) died.
On 31 Oct 1354 [her husband] William Clinton 1st Earl Huntingdon (age 50) died. Earl Huntingdon extinct.
In 1361 [her former step-son] Nicholas Blount (age 40) died.
After 1366 [her former step-son] William Blount (age 71) died.
In 1367 Juliana Leybourne Countess Huntingdon (age 64) died.
Hugh Hastings and Margery Foliot were married. She a great x 4 granddaughter of King John "Lackland" of England.
Great x 1 Grandfather: Roger Leybourne
GrandFather: William Leybourne 1st Baron Leybourne
Father: Thomas Leybourne
Great x 2 Grandfather: Simon de Sandwich
Great x 1 Grandfather: Henry de Sandwich
GrandMother: Juliana de Sandwich
Great x 1 Grandmother: Joan d'Auberville
Juliana Leybourne Countess Huntingdon
Mother: Alice Tosny