In Jul 1368 [his father] John Hastings 2nd Earl Pembroke (age 20) and [his mother] Anne Manny Countess Pembroke were married. She by marriage Countess Pembroke. She the daughter of Walter Manny 1st Baron Manny (age 58) and Margaret Plantagenet 2nd Countess Norfolk. He the son of Laurence Hastings 1st Earl Pembroke and Agnes Mortimer Countess of Pembroke. They were half fourth cousins. He a great x 5 grandson of King John "Lackland" of England. She a great granddaughter of King Edward "Longshanks" I of England.

On 24 Jun 1380 John Hastings 3rd Earl Pembroke (age 7) and Elizabeth Lancaster Duchess Exeter (age 17) were married at Kenilworth Castle [Map]. She by marriage Countess Pembroke. She the daughter of John of Gaunt 1st Duke Lancaster (age 40) and Blanche Plantagenet Duchess Lancaster. He the son of John Hastings 2nd Earl Pembroke and Anne Manny Countess Pembroke. They were half third cousins. He a great x 2 grandson of King Edward "Longshanks" I of England. She a granddaughter of King Edward III of England.

After 24 Jun 1380 John Hastings 3rd Earl Pembroke (age 7) and Elizabeth Lancaster Duchess Exeter (age 17) marriage annulled since she had become pregnant by John Holland 1st Duke Exeter (age 28) whom she subsequently married. It isn't clear whether John Holland was punished; he was half-brother to King Richard II of England (age 13) through their mother Joan "Fair Maid of Kent" Princess Wales (age 51).

On 24 Jun 1386 John Holland 1st Duke Exeter (age 34) and [his wife] Elizabeth Lancaster Duchess Exeter (age 23) were married at Plymouth, Devon [Map]. She the daughter of John of Gaunt 1st Duke Lancaster (age 46) and Blanche Plantagenet Duchess Lancaster. He the son of Thomas Holland 1st Earl Kent and Joan "Fair Maid of Kent" Princess Wales. They were half second cousin once removed. He a great grandson of King Edward "Longshanks" I of England. She a granddaughter of King Edward III of England.

Around 1388 John Hastings 3rd Earl Pembroke (age 15) and Philippa Mortimer Countess Pembroke, Arundel and Surrey (age 12) were married. She by marriage Countess Pembroke. She the daughter of Edmund Mortimer 3rd Earl March, Earl Ulster and Philippa Plantagenet Countess March 5th Countess Ulster. He the son of John Hastings 2nd Earl Pembroke and Anne Manny Countess Pembroke. They were second cousin once removed. He a great x 2 grandson of King Edward "Longshanks" I of England. She a great granddaughter of King Edward III of England.

After 30 Dec 1389 Richard Fitzalan 9th Earl Surrey 11th Earl Arundel (age 43) and [his former wife] Philippa Mortimer Countess Pembroke, Arundel and Surrey (age 14) were married. She by marriage Countess Arundel Sussex, Countess Surrey. The difference in their ages was 29 years. She the daughter of Edmund Mortimer 3rd Earl March, Earl Ulster and Philippa Plantagenet Countess March 5th Countess Ulster. He the son of Richard Fitzalan 10th Earl Arundel 8th Earl Surrey and Eleanor Plantagenet Countess Arundel and Surrey. They were first cousin twice removed. He a great x 2 grandson of King Henry III of England. She a great granddaughter of King Edward III of England.

In Apr 1398 Thomas Poynings 5th Baron St John Basing (age 47) and [his former wife] Philippa Mortimer Countess Pembroke, Arundel and Surrey (age 22) were married. She by marriage Baroness St John Basing. The difference in their ages was 24 years. She the daughter of Edmund Mortimer 3rd Earl March, Earl Ulster and Philippa Plantagenet Countess March 5th Countess Ulster. She a great granddaughter of King Edward III of England.

In 1400 John Cornwall 1st Baron Fanhope 1st Baron Milbroke (age 36) and [his former wife] Elizabeth Lancaster Duchess Exeter (age 36) were married. She the daughter of John of Gaunt 1st Duke Lancaster and Blanche Plantagenet Duchess Lancaster. He a great x 3 grandson of King John "Lackland" of England. She a granddaughter of King Edward III of England.