Like others in her family she married many times. Some stories from wikipedia
She was niece of Richard II of England, son of her paternal grandmother, Joan of Kent by her second marriage to Edward, the Black Prince. Joan had five sisters: Alianore became Countess of March ; Margaret became Countess of Somerset and later Duchess of Clarence; Eleanor became Countess of Salisbury; Elizabeth married Sir John Neville; and Bridget became a nun at Barking Abbey.
Her eldest brother, Thomas Holland, 1st Duke of Surrey, was beheaded in 1400 by a mob of angry citizens at Cirencester for his role in the Epiphany Rising, which was aimed against the life of King Henry IV of England, who had usurped the throne of King Richard. Thomas's heir to the earldom of Kent was her second eldest brother Edmund Holland.
Lady Joan married Edmund of Langley, 1st Duke of York, son of Edward III of England and Philippa of Hainault, ca. 4 November 1393. As a result of this marriage, she was styled Duchess of York. They had no children.
In 1399, Joan and her sister Margaret were invested as "Lady Companions of the Garter." They were granddaughters of Joan, the "Fair Maid of Kent" who inspired Edward III's founding of the Order of the Garter, according to popular legend.
After Langley's death in 1402, Joan married (before 9 August 1404) William de Willoughby, 5th Lord Willoughby de Eresby (c. 1370-1409), a Knight of the Garter, son of Robert de Willoughby, 4th Lord Willoughby de Eresby, and Alice Skipwith.
Upon her marriage, she became The Baroness Willoughby de Eresby, or Lady Willoughby. Lord Willoughby died on 30 November 1409.
Her third marriage (after 6 September 1410) was to Henry le Scrope, 3rd Baron Scrope of Masham. That year, Scrope was made a Knight of the Garter. He served Henry IV as treasurer, and was executed in 1415 following the failure of his plot with the Earl of Cambridge (Joan's former stepson, being the son of her first husband, and nephew by marriage, being the husband of Anne de Mortimer, her sister's daughter) to assassinate Henry V and place Edmund Mortimer, 5th Earl of March (Joan's nephew) on the throne. (The Earl of March had been the heir presumptive of Richard II. In 1399 Richard was forced to abdicate in favour of Henry IV, and for the next few decades Mortimer served as a focal point for conspiracies aimed at removing Henry IV and his heirs from the throne.)
Lord Scrope and Cambridge were both beheaded on 5 August 1415 at Southampton Green, Hampshire, England. Cambridge's then four-year old son, Richard Plantagenet, ultimately championed his father's cause, which evolved into the Wars of the Roses and the Yorkist claimants achieving the throne.
Less than a year later, before 27 April 1416, Joan married her fourth and final husband, Sir Henry Bromflete, son of Sir Thomas Bromflete and Margaret St. John.
She died on 12 April 1434. Her husband, Bromflete, was summoned to Parliament as the 1st Lord Vesci (or Vessy) on 24 January 1449. He died on 16 January 1469.
Accompanying Richard II on his march into Scotland, he was created Duke of York in August 1385, and subsequently on three occasions he acted as regent of England. In this capacity he held a parliament in 1395, and he was again serving as regent when Henry of Lancaster, afterwards Henry IV, landed in England in July 1399.
His second wife was Joan, or Johanna (d.1434), daughter of Thomas Holland, Earl of Kent, but his only children were two sons Richard of York, Earl of Cambridge and a daughter, Constance (d.1416), by his first wife.