Katherine Brandon, Duchess of Suffolk
Katherine Brandon, Duchess of Suffolk, "suo jure" 12th Baroness Willoughby de Eresby (22 March 1519 – 19 September 1580), was an English noblewoman living at the courts of King Henry VIII, King Edward VI and
Queen Elizabeth I. She was the fourth wife of Charles Brandon, 1st Duke of Suffolk, who acted as her legal guardian during his third marriage to Henry VIII's sister Mary.
Her second husband was Richard Bertie, a member of her household.
Following Charles Brandon's death in 1545, it was rumoured that King Henry had considered marrying Catherine as his seventh wife, while he was still married to his sixth wife, Catherine Parr, who was Katherine's close friend.
An outspoken supporter of the English Reformation
, she fled abroad to Wesel and later the Grand Duchy of Lithuania during the reign of Queen Mary I, to avoid persecution.
Clementina Drummond-Willoughby, 24th Baroness Willoughby de Eresby
Clementina Elizabeth Drummond- Willoughby, 24th Baroness Willoughby de Eresby( 2 September 1809, London – 13 November 1888, Grimsthorpe Castle) was a" suo jure" British baroness.
She was the daughter of Peter Robert Drummond- Burrell, 22nd Baron Willoughby de Eresby( died 1865) and Sarah Clementina, née Drummond( died 1865).
On the death of her brother, Albyric Drummond- Willoughby, 23rd Baron Willoughby de Eresby, in 1871, the Barony of Willoughby de Eresby fell into abeyance between her sister, Charlotte, and her.
On 13 November 1871, the abeyance of the barony was terminated in her favour.
She was born and baptised with the name of Clementina Elizabeth Burrell- Drummond.
And on 4 May 1872, her name was changed to Clementina Elizabeth Heathcote- Drummond- Willoughby by Royal Licence.
She married Sir Gilbert John Heathcote, 1st Baron Aveland on 8 October 1827 in Drummond Castle.
They became parents of: She was also Joint( 1/4) Hereditary Lord Great Chamberlain from 1870 to her death.
She was buried in Normanton, Rutland.
Joan Willoughby, 7th Baroness Willoughby de Eresby
Joan
Willoughby," de jure suo jure" 7th Baroness Willoughby de Eresby( c.1425- d. before 13 February 1462) was an English baroness in her own right.
Peregrine Bertie, 13th Baron Willoughby de Eresby
Peregrine Bertie, 13th Baron Willoughby de Eresby( 12 October 1555 – 25 June 1601) was the son of Catherine Willoughby, 12th Baroness Willoughby de Eresby, and Richard Bertie.
Bertie was Lady Willoughby de Eresby's second husband, the first being Charles Brandon, Duke of Suffolk.
Peregrine Bertie's half- brothers, Henry and Charles Brandon, died as teenagers four years before his birth.
His sister Susan married the Earl of Kent and then the nephew of Bess of Hardwick.
Owing to religious politics, the parents had to move outside England and the boy was born at Wesel on the River Rhine.
Richard Bertie (courtier)
Richard Bertie( ca. 15179 April 1582) was an English landowner and religious evangelical.
He was the second husband of Catherine Willoughby, 12th Baroness Willoughby de Eresby, Duchess Dowager of Suffolk and a woman whom Henry VIII was considering as his seventh wife shortly before his death; she also received a proposal from the King of Poland.
Christopher Willoughby, 10th Baron Willoughby de Eresby
Sir Christopher Willoughby, "de jure" 10th Baron Willoughby de Eresby (1453 – between 1 November 1498 and 13 July 1499), was heir to his second cousin, Joan Welles, 9th Baroness Willoughby de Eresby, in her own right Lady Willoughby, as well as great-grandson and heir male to William Willoughby, 5th Baron Willoughby de Eresby.
Christopher Willoughby was also heir to his elder brother, Robert Willoughby, who died unmarried and underage on 24 March 1467.
He was unable to enjoy his inherited title as a result of the attainders of his cousin Joan Welles' father, Richard Welles, 7th Baron Welles, and brother, Robert Welles, 8th Baron Willoughby de Eresby.
Joan Welles, 9th Baroness Willoughby de Eresby
Joan Welles," de jure suo jure" 9th Baroness Willoughby de Eresby( d. before 23 January 1475), inherited the baronies of Welles and Willoughby at the death of her brother, Robert Welles, 8th Baron Willoughby de Eresby, in 1470.
William Willoughby, 11th Baron Willoughby de Eresby
William Willoughby, 11th Baron Willoughby de Eresby (1482–1526), was an English baron and the largest landowner in Lincolnshire.
He was the son of Sir Christopher Willoughby (died c. 1498) and Margaret or Marjery Jenney (daughter of Sir William Jenney of Knodishall, Suffolk, Justice of the King's Bench).
In 1499, he succeeded as Baron Willoughby de Eresby.
He married first Mary Hussey (born 1484), youngest child of Sir William Hussey, Chief Justice of the King’s Bench.
Secondly, on 5 June 1516, he married María de Salinas, the Spanish-born lady-in-waiting to Catherine of Aragon.
Grimsthorpe Castle was granted by Henry VIII to the de Eresby family on the occasion of Maria's marriage.
By his second wife, Willoughby had a daughter, Catherine, who succeeded him in the barony on his death in 1526.
She was betrothed to Henry Brandon, 1st Earl of Lincoln, the son of Charles Brandon, 1st Duke of Suffolk, and Princess Mary, the sister of Henry VIII.
When Princess Mary died in 1533, fourteen-year-old Catherine was hastily married to the Duke of Suffolk, her fiance's father, who was twenty-five years her senior.
In 1546, there were rumours that Henry VIII wished to marry the widowed Catherine.
Willoughby died on 14 October 1526 at Parham, Suffolk and was buried on 19 October at All Saints Church, Mettingham, Suffolk.
María de Salinas
María de Salinas, Baroness Willoughby de Eresby( ca. 1490 – 1539) was a noblewoman from Spain.
She served as confidante and lady- in- waiting to Catherine of Aragon, Queen of England.
Robert Welles, 8th Baron Willoughby de Eresby
Robert Welles, 8th Baron Willoughby de Eresby and 8th Baron Welles( died 19 March 1470), was the son of Richard Welles, 7th Baron Welles, and Joan Willoughby, 7th Baroness Willoughby de Eresby.
He was the prime mover in an uprising against Edward IV in 1470, although his actions were possibly orchestrated by Richard Neville, 16th Earl of Warwick.

Question: Who is Katherine Brandon, Duchess Of Suffolk's mother?
Answer: María de Salinas