Isabella FitzRoy, Duchess of Grafton
Isabella Bennet FitzRoy, Duchess of Grafton and later 2nd Countess of Arlington" suo jure"( c. 1668 – 7 February 1723), was a British peer and heiress.
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.
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.
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.
Maria Teresa Felicitas d'Este
Maria Teresa Felicitas d'Este (October 6, 1726 – April 30, 1754) was born a princess of Modena and was by marriage the Duchess of Penthièvre.
She was the mother-in-law of Philippe Égalité and thus grandmother to the future Louis-Philippe of France.
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.
Mary FitzRoy, Duchess of Richmond and Somerset
Mary FitzRoy, Duchess of Richmond and Somerset (Howard; 1519 – 7 December 1557), born Lady Mary Howard, was the only daughter-in-law of King Henry VIII of England, being the wife of his only acknowledged illegitimate son, Henry FitzRoy, 1st Duke of Richmond and Somerset.
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.
Charlotte Lennox, Duchess of Richmond
Charlotte Lennox, Duchess of Richmond( née Lady Charlotte Gordon; 20 September 1768 – 5 May 1842), was a British peeress best known as the hostess of the Duchess of Richmond's ball.
Henry FitzRoy, Duke of Richmond and Somerset
Henry FitzRoy, Duke of Richmond and Somerset (15 June 1519 – 23 July 1536), was the son of King Henry VIII of England and his mistress, Elizabeth Blount, and the only illegitimate offspring whom Henry VIII acknowledged.
He was the younger half-brother of Queen Mary I, as well as the older half-brother of Queen Elizabeth I and King Edward VI.
Through his mother he was the elder half-brother of the 4th Baroness Tailboys of Kyme and of the 2nd and 3rd Barons Tailboys of Kyme.
He was named FitzRoy, which means "son of the king".

Question: Who is Mary Fitzroy, Duchess Of Richmond And Somerset's mother-in-law?
Answer: Elizabeth Blount