Marian Shields Robinson
Marian Lois Robinson( née Shields; born July 29, 1937) is the mother of Michelle Obama, former First Lady of the United States, and Craig Robinson, a basketball executive, and the mother- in- law of former U.S. President Barack Obama.
Maria Thins
Maria Thins( c. 1593 – 27 December 1680) was the mother- in- law of Johannes Vermeer and a member of the Gouda Thins family.
Anne Calthorpe, Countess of Sussex
Anne Calthorpe, Countess of Sussex (died between 22 August 1579 and 28 March 1582) was the second wife of Henry Radcliffe, 2nd Earl of Sussex, who divorced her in 1555 on the grounds of her alleged bigamous marriage to Sir Edmund Knyvet, and her "unnatural and unkind" character.
She served as a lady-in-waiting in the household of Queen consort Catherine Parr, the sixth wife of King Henry VIII, and shared her Reformed beliefs.
She was implicated in the heresy of Anne Askew.
In 1552, she was sent to the Tower of London for having practised sorcery and having made "treasonous prophecies".
Vera Miletić
Vera Miletić (Serbian Cyrillic: Вера Милетић; 8 March 1920 – 7 September 1944) was a Serbian student and soldier.
She was notable for being the mother of Mira Marković, posthumously making her the mother-in-law of Serbian president Slobodan Milošević.
Doria Ragland
Doria L. Ragland( born September 2, 1956) is the mother of Meghan, Duchess of Sussex, the mother- in- law of Prince Harry, and the maternal grandmother of Archie Mountbatten- Windsor, who is seventh in line to the British throne.
She is a former makeup artist, business owner, yoga instructor, and former social worker who worked in the mental health sector from 2015 to 2018.
Priscilla Pointer
Priscilla Marie Pointer( born May 18, 1924) is an American stage, film and television character actress.
She began her career in the theater, including productions on Broadway.
Later, Pointer moved to Hollywood to act in films and on television.
She is the mother of Amy Irving, therefore making her the former mother- in- law of filmmakers Steven Spielberg and Bruno Barreto and the mother- in- law of documentary filmmaker Kenneth Bowser, Jr.
Eldon Howard
Eldon Howard was a British screenwriter.
She was the mother- in- law of Edward J. Danziger and wrote a number of the screenplays for films by his company Danziger Productions.
Baroness Gösta von dem Bussche-Haddenhausen
Baroness Gösta von dem Bussche- Haddenhausen( 26 January 1902 – 13 June 1996) was the mother of Prince Claus of the Netherlands, who was the Prince Consort of Queen Beatrix of the Netherlands, thus making her the mother- in- law of the former Dutch Queen.
She is also the paternal grandmother of King Willem- Alexander of the Netherlands, who is the current Dutch King.
Richard Page (courtier)
Sir Richard Page( died 1548) was an English courtier.
He was a gentleman of the Privy Chamber at the court of Henry VIII of England, and Vice- Chamberlain in the household of Henry VIII's illegitimate son, Henry FitzRoy.
Page was imprisoned in the Tower of London in 1536 during the downfall of Anne Boleyn.
He married Elizabeth Bourchier, the mother- in- law of the Protector Somerset
Henry Radclyffe, 2nd Earl of Sussex
Henry Radclyffe, 2nd Earl of Sussex, KG (also spelled "Radcliffe")
(1507 – 17 February 1557) was a son of Robert Radclyffe, 1st Earl of Sussex and his wife Elizabeth Stafford, Countess of Sussex.
His maternal grandparents were Henry Stafford, 2nd Duke of Buckingham and his wife Catherine Woodville.
He was a second cousin to among others Thomas Grey, 2nd Marquess of Dorset, Arthur, Prince of Wales, Margaret, queen consort of Scotland, Henry VIII of England, Elizabeth Tudor, Mary, queen consort of France, Edmund Tudor, Duke of Somerset, Katherine Tudor, Henry Courtenay, 1st Marquess of Exeter, Margaret Courtenay and Henry Somerset, 2nd Earl of Worcester.

Question: Who is the mother-in-law of Anne Calthorpe, Countess Of Sussex?
Answer: Elizabeth Stafford, Countess of Sussex