Before 1049 Frederick Luxemburg Ardennes Duke Lower Lorraine (age 46) and Gerberga Flanders Duchess Lower Lorraine (age 33) were married. She by marriage Duchess Lower Lorraine. She the daughter of Eustace Flanders I Count Boulogne and Matilda Reginar Countess Boulogne. They were first cousin twice removed.

In 1238 William Ferrers 5th Earl of Derby (age 45) and Margaret Quincy Countess Derby were married. She the daughter of Roger de Quincy 2nd Earl Winchester (age 43) and Helen Galloway Countess Winchester. He the son of William Ferrers 4th Earl of Derby (age 70) and Agnes Gernon Countess Derby. They were first cousin twice removed. He a great x 3 grandson of King Henry I "Beauclerc" England. She a great x 5 granddaughter of King Henry I "Beauclerc" England.

In 1253 Alfonso III King Portugal (age 42) and Beatrice Queen Consort Portugal (age 11) were married. She by marriage Queen Consort Portugal. The difference in their ages was 31 years. She the illegitmate daughter of Alfonso X King Castile X King Leon (age 31) and Mayor Guillén de Guzmán (age 48). He the son of Alfonso "Fat" II King Portugal and Urraca Ivrea Queen Consort Portugal. They were first cousin twice removed. He a great grandson of King Henry "Curtmantle" II of England. She a great x 3 granddaughter of King Henry "Curtmantle" II of England.

After 1256 Philip Basset (age 72) and Ela Longespée (age 32) were married. The difference in their ages was 40 years. They were first cousin twice removed. He a great x 2 grandson of King Henry I "Beauclerc" England. She a great granddaughter of King Henry "Curtmantle" II of England.

In 1318 Odo IV Duke Burgundy (age 23) and Joan Capet Duchess Burgundy (age 9) were married. She by marriage Duchess Burgundy. She the daughter of Philip V King France I King Navarre (age 25) and Joan of Burgundy Queen Consort France (age 26). He the son of Robert II Duke Burgundy and Agnes Capet Duchess Burgundy (age 58). They were first cousin twice removed. He a great x 3 grandson of King Henry "Curtmantle" II of England. She a great x 5 granddaughter of King Henry "Curtmantle" II of England.

Before 1339 Juan Manuel Prince of Villena (age 56) and Blanca de la Cerda y Lara (age 21) were married. The difference in their ages was 34 years. They were first cousin twice removed. He a great x 3 grandson of King Henry "Curtmantle" II of England. She a great x 4 granddaughter of King Henry "Curtmantle" II 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.

In May 1406 Richard of Conisbrough 1st Earl Cambridge (age 20) and Anne Mortimer (age 15) were married. The marriage apparently took place in secret possibly because she was a descendant of King Edward III of England although she wasn't at the time Heir to the Throne of England although their issue would become so. She died five years later. She the daughter of Roger Mortimer 4th Earl March 6th Earl Ulster and Eleanor Holland Countess March and Ulster. He the son of Edmund of Langley 1st Duke York and Isabella of Castile Duchess York. They were first cousin twice removed. He a grandson of King Edward III of England. She a great x 2 granddaughter of King Edward III of England.

In or before 1499 Robert Strange of Elsing (age 20) and Margaret le Strange (age 27) were married. They were first cousin twice removed.

On 16 Jul 1518 Manuel "Fortunate" I King Portugal (age 49) and Eleanor of Austria Queen Consort France Queen Consort Portugal (age 19) were married. She by marriage Queen Consort Portugal. The difference in their ages was 29 years. She the daughter of Philip "Handsome Fair" King Castile and Joanna "The Mad" Trastámara Queen Castile (age 39). They were first cousin twice removed. He a great x 3 grandson of King Edward III of England. She a great x 4 granddaughter of King Edward III of England.

Before 1574 William Graham 5th Earl Menteith (age 23) and Margaret Douglas Countess Menteith (age 35) were married. He the son of John Graham 4th Earl Menteith and Marie Seton Countess Menteith and Sutherland. They were first cousin twice removed.

On 06 Jan 1579 Robert Stewart 1st Earl Lennox 1st Earl March (age 57) and Elizabeth Stewart Countess Arran Countess Lennox and March (age 30) were married. She by marriage Countess Lennox. The difference in their ages was 27 years. She the daughter of John Stewart 4th Earl Atholl and Elizabeth Gordon Countess Atholl. He the son of John Stewart 3rd Earl Lennox and Isabel or Elizabeth Stewart Countess Lennox. They were first cousin twice removed. He a great x 4 grandson of King Edward III of England.

On 19 May 1581 Robert Stewart 1st Earl Lennox 1st Earl March (age 59) and Elizabeth Stewart Countess Arran Countess Lennox and March (age 32) were divorced.

Before Feb 1655 Nicholas Knollys 3rd Earl Banbury (age 24) and Isabella Blount (age 25) were married. She the daughter of Mountjoy Blount 1st Earl Newport (age 58) and Anne Boteler Countess Newport and Portland (age 55). He the son of William Knollys 1st Earl Banbury and Elizabeth Howard Countess Banbury (age 72). They were first cousin twice removed.

On 27 Jul 1721 Thomas L'Estrange 5th Baronet and Dorothy Spring Lady Strange were married. They were first cousin twice removed.

On 22 Jun 1731 Robert Lowther (age 49) and Katherine Pennington were married. They were first cousin twice removed.

In 1901 Evelyn Baring 1st Earl Cromer Norfolk (age 59) and Katherine Georgina Louisa Thynne Countess Cromer (age 35) were married. The difference in their ages was 24 years. She the daughter of John Alexander Thynne 4th Marquess of Bath and Frances Isabella Catherine Vesey Marchioness Bath. They were first cousin twice removed.

Richard Dashwood of Clockley Cley and Anne Peyton were married. They were first cousin twice removed.