In Jan 1562 [her father] Francis Walsingham (age 30) and Anne Barne (age 29) were married.

In 1566 [her father] Francis Walsingham (age 34) and [her mother] Ursula St Barbe (age 34) were married.

In 1583 Philip Sidney (age 28) and Frances Walsingham Countess Essex (age 16) were married.

On 23 Sep 1584 [her brother-in-law] Robert Sidney 1st Earl of Leicester (age 20) and Barbara Gamage Countess Leicester (age 21) were married. She her father's heir to his considerable fortune. He, the father, had died some twenty-five days before. The marriage took place apparently against the wishes of Queen Elizabeth I of England and Ireland (age 51).

In 1590 Robert Devereux 2nd Earl Essex (age 24) and Frances Walsingham Countess Essex (age 23) were married. She by marriage Countess Essex. He the son of Walter Devereux 1st Earl Essex and Lettice Knollys Countess Essex (age 46).

In 1594 Henry "Wizard Earl" Percy 9th Earl of Northumberland (age 29) and [her sister-in-law] Dorothy Devereux Countess Northumberland (age 30) were married. She the daughter of Walter Devereux 1st Earl Essex and [her mother-in-law] Lettice Knollys Countess Essex (age 50). He the son of Henry Percy 8th Earl of Northumberland and Katherine Neville Countess Northumberland (age 49). They were third cousin once removed.

On 05 Mar 1599 [her son-in-law] Roger Manners 5th Earl of Rutland (age 22) and [her daughter] Elizabeth Sidney Countess Rutland (age 14) were married. She by marriage Countess of Rutland. Childless, unhappy and possibly not consummated. She the daughter of [her former husband] Philip Sidney and Frances Walsingham Countess Essex (age 32). He the son of John Manners 4th Earl of Rutland and Elizabeth Charlton Countess Rutland.

In 1603 Richard Burke 4th Earl Clanricarde 1st Earl St Albans (age 31) and Frances Walsingham Countess Essex (age 36) were married. He the son of Ulrick Burke 3rd Earl Clanricarde.

In 1603 [her son] Robert Devereux 3rd Earl Essex (age 11) and [her daughter-in-law] Frances Howard Countess Essex and Somerset (age 12) were married. They were separated after the wedding given their young age. Essex went on a European tour from 1607 to 1609. When he returned she avoided him having fallen for Robert Carr 1st Earl Somerset (age 16) whilst her husband was away. He was ill with smallpox. She sought an annulment with her father [her former husband] Robert Devereux 2nd Earl Essex and uncle Henry Howard 1st Earl of Northampton (age 62) acting for her. She maintained the marriage had not been consummated and was examined by ten matrons and two midwives who found her hymen intact. It was widely rumoured at the time that Sir Thomas Monson's (age 38) daughter was a substitute, which is possible because she had requested to be veiled during the examination "for modesty's sake". He maintained he was capable with other women, but was unable to consummate his marriage blaming her. She the daughter of Thomas Howard 1st Earl Suffolk (age 41) and Catherine Knyvet Countess Suffolk (age 39). He the son of Robert Devereux 2nd Earl Essex and Frances Walsingham Countess Essex (age 36). They were fourth cousins.

On 25 Sep 1613 [her son] Robert Devereux 3rd Earl Essex (age 22) and [her daughter-in-law] Frances Howard Countess Essex and Somerset (age 23) marriage annulled by King James I of England and Ireland and VI of Scotland (age 47). She married Robert Carr 1st Earl Somerset (age 26) three months later.

On 03 Mar 1617 [her son-in-law] William Seymour 2nd Duke of Somerset (age 29) and [her daughter] Frances Devereux Duchess of Somerset (age 17) were married at Drayton Bassett, Staffordshire [Map]. She the daughter of [her former husband] Robert Devereux 2nd Earl Essex and Frances Walsingham Countess Essex (age 50). They were fourth cousins. He a great x 3 grandson of King Henry VII of England and Ireland.

In 1622 [her son] Ulick Burke 1st Marquess Clanricarde (age 18) and [her daughter-in-law] Anne Compton Lady Rushout were married. She the daughter of William Compton 1st Earl of Northampton and Elizabeth Spencer Countess Northampton. He the son of [her husband] Richard Burke 4th Earl Clanricarde 1st Earl St Albans (age 50) and Frances Walsingham Countess Essex (age 55).

Before 09 Sep 1623 [her son-in-law] Henry Shirley 2nd Baronet (age 35) and [her daughter] Dorothy Devereux Lady Shirley (age 23) were married. She the daughter of [her former husband] Robert Devereux 2nd Earl Essex and Frances Walsingham Countess Essex (age 56).

On 11 Mar 1630 [her son] Robert Devereux 3rd Earl Essex (age 39) and [her daughter-in-law] Elizabeth Paulet Countess Essex were married. She by marriage Countess Essex. He the son of [her former husband] Robert Devereux 2nd Earl Essex and Frances Walsingham Countess Essex (age 63). They were fourth cousins.