On 09 Feb 1321 [his father] Richard Fitzalan 10th Earl Arundel 8th Earl Surrey (age 15) and [his step-mother] Isabel Despencer Countess Arundel (age 9) were married at Havering atte Bower [Map]. She by marriage Countess Arundel Sussex. He the son of Edmund Fitzalan 9th Earl Arundel (age 35) and Alice Warenne Countess Arundel. They were half third cousin once removed. He a great x 5 grandson of King John "Lackland" of England. She a great granddaughter of King Edward "Longshanks" I of England.

On 06 Nov 1330 John Beaumont 2nd Baron Beaumont (age 12) and [his mother] Eleanor Plantagenet Countess Arundel and Surrey (age 12) were married. She the daughter of Henry Plantagenet 3rd Earl of Leicester 3rd Earl Lancaster (age 49) and Maud Chaworth. He the son of Henry Beaumont Earl Buchan (age 51) and Alice Comyn Baroness Beaumont. They were fourth cousins. He a great x 4 grandson of King Henry I "Beauclerc" England. She a great granddaughter of King Henry III of England.

On 05 Feb 1344 [his father] Richard Fitzalan 10th Earl Arundel 8th Earl Surrey (age 38) and [his mother] Eleanor Plantagenet Countess Arundel and Surrey (age 25) were married at Ditton Church, Stoke Poges. She by marriage Countess Arundel Sussex. She the daughter of Henry Plantagenet 3rd Earl of Leicester 3rd Earl Lancaster (age 63) and Maud Chaworth. He the son of Edmund Fitzalan 9th Earl Arundel and Alice Warenne Countess Arundel. They were half third cousins. He a great x 5 grandson of King John "Lackland" of England. She a great granddaughter of King Henry III of England.

On 28 Oct 1371 [his son-in-law] Robert Ufford and [his daughter] Eleanor Fitzalan (age 6) were married. She the daughter of Richard Fitzalan 9th Earl Surrey 11th Earl Arundel (age 25) and Elizabeth Bohun Countess Arundel and Surrey (age 21). He the son of William Ufford 2nd Earl Suffolk (age 33) and Joan Montagu Countess Suffolk (age 22). They were half third cousins. He a great x 2 grandson of King Edward "Longshanks" I of England. She a great x 2 granddaughter of King Edward "Longshanks" I of England.

In or before 1383 [his son-in-law] William Montagu and [his daughter] Elizabeth Fitzalan Duchess Norfolk (age 16) were married. She the daughter of Richard Fitzalan 9th Earl Surrey 11th Earl Arundel (age 36) and Elizabeth Bohun Countess Arundel and Surrey (age 32). He the son of William Montagu 2nd Earl Salisbury (age 54) and Elizabeth Mohun Countess of Salisbury. They were third cousin once removed. She a great x 2 granddaughter of King Edward "Longshanks" I of England.

Before 17 Sep 1385 [his son-in-law] Thomas Mowbray 1st Duke of Norfolk (age 17) and [his daughter] Elizabeth Fitzalan Duchess Norfolk (age 19) were married. She by marriage Countess Nottingham. She the daughter of Richard Fitzalan 9th Earl Surrey 11th Earl Arundel (age 39) and Elizabeth Bohun Countess Arundel and Surrey. They were second cousins. He a great x 2 grandson of King Edward "Longshanks" I of England. She a great x 2 granddaughter of King Edward "Longshanks" I of England.

Around 1388 John Hastings 3rd Earl Pembroke (age 15) and [his future wife] 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 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.

On 23 Jul 1392 [his son-in-law] William Beauchamp 1st Baron Bergavenny (age 49) and [his daughter] Joan Fitzalan Baroness Bergavenny were married. She by marriage Baroness Bergavenny. She the daughter of Richard Fitzalan 9th Earl Surrey 11th Earl Arundel (age 46) and Elizabeth Bohun Countess Arundel and Surrey. He the son of Thomas Beauchamp 11th Earl Warwick and Katherine Mortimer Countess Warwick. They were second cousin twice removed. He a great x 5 grandson of King John "Lackland" of England. She a great x 2 granddaughter of King Edward "Longshanks" I of England.

Before 1393 Henry "Hotspur" Percy (age 28) and [his sister-in-law] Elizabeth Mortimer Baroness Camoys (age 21) were married. She the daughter of Edmund Mortimer 3rd Earl March, Earl Ulster and Philippa Plantagenet Countess March 5th Countess Ulster. He the son of Henry Percy 1st Earl of Northumberland (age 51) and Margaret Neville. They were second cousin once removed. He a great x 3 grandson of King Henry III of England. She a great granddaughter of King Edward III of England.

Around 1394 William Ros 6th Baron Ros Helmsley (age 24) and Margaret Fitzalan Baroness Ros Helmsley (age 22) were married. She by marriage Baroness Ros Helmsley. She brought a 40 mark annuity to the marriage awarded to her by King Richard II of England (age 26) following the death of his wife Anne of Bohemia Queen Consort England (age 27) in whose household she had been. She the sister of the Earl of Arundel (age 48). He the son of Thomas Ros 4th Baron Ros Helmsley and Beatrice Stafford Countess Desmond (age 53). He a great x 3 grandson of King Edward "Longshanks" I of England. She a great x 3 granddaughter of King Henry 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.