In Sep 1359, a case of Marriage of Two Sets of Siblings, siblings from the de Bohun family, children of William Bohun 1st Earl of Northampton (age 49), his only children, and the Fitzalan family, children of Richard Fitzalan 10th Earl Arundel 8th Earl Surrey 1306, were married:

Richard Fitzalan 9th Earl Surrey 11th Earl Arundel (age 13) and Elizabeth Bohun Countess Arundel and Surrey (age 9) were married. She the daughter of William Bohun 1st Earl of Northampton (age 49) and Elizabeth Badlesmere Countess Northampton. He the son of Richard Fitzalan 10th Earl Arundel 8th Earl Surrey (age 53) and Eleanor Plantagenet Countess Arundel and Surrey (age 40). They were third cousins. He a great x 2 grandson of King Henry III of England. She a great granddaughter of King Edward "Longshanks" I of England.

Humphrey Bohun 7th Earl Hereford 6th Earl Essex 2nd Earl of Northampton (age 18) and Joan Fitzalan Countess Essex, Hereford and Northampton (age 12) were married. She the daughter of Richard Fitzalan 10th Earl Arundel 8th Earl Surrey (age 53) and Eleanor Plantagenet Countess Arundel and Surrey (age 40). He the son of William Bohun 1st Earl of Northampton (age 49) and Elizabeth Badlesmere Countess Northampton. They were third cousins. He a great grandson of King Edward "Longshanks" I of England. She a great x 2 granddaughter of King Henry III of England.