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.
Princess Elisabeth of Savoy
Elisabeth of Savoy (Maria Francesca Elisabetta Carlotta Giuseppina; 13 April 1800 – 25 December 1856) was the Vicereine of the Kingdom of Lombardy-Venetia by marriage to Archduke Rainer of Austria.
She was the aunt and mother-in-law of Vittorio Emanuele II, the first king of a united Italy.
Karl Theodor, Duke in Bavaria
Karl- Theodor, Duke in Bavaria( 9 August 1839 – 30 November 1909), was a member of the House of Wittelsbach and a professional oculist.
He was the favorite brother of the Empress Elisabeth of Austria, and father of Queen Elisabeth of the Belgians.
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.
Elisabeth of Austria, Queen of France
Elisabeth of Austria (5 July 1554 – 22 January 1592) was Queen of France from 1570 to 1574 as the wife of King Charles IX.
A member of the House of Habsburg, she was the daughter of Maximilian II, Holy Roman Emperor, and Maria of Spain.
Charles IX of France
Charles IX (27 June 1550 – 30 May 1574) was King of France from 1560 until his death in 1574 from tuberculosis.
He ascended the throne of France upon the death of his brother Francis II in 1560.
After decades of tension, war broke out between Protestants and Catholics after the massacre of Vassy in 1562.
In 1572, after several unsuccessful peace attempts, Charles ordered the marriage of his sister Margaret of Valois to Henry of Navarre (the future King Henry IV of France), a major Protestant nobleman who was in the line of succession to the French throne, in a last desperate bid to reconcile his people.
Facing popular hostility against this policy of appeasement, Charles allowed the massacre of all Huguenot leaders who gathered in Paris for the royal wedding at the instigation of his mother Catherine de' Medici.
This event, known as the St. Bartholomew's Day massacre, was a significant blow to the Huguenot movement, though religious civil warfare soon began anew.
Charles sought to take advantage of the disarray of the Huguenots by ordering the Siege of La Rochelle, but was unable to take the Protestant stronghold.
All of his decision-making was influenced by his mother Catherine de' Medici, a fervent Roman Catholic who initially sought peace between Catholics and Protestants, but after the St. Bartholomew's Day Massacre supported the persecution of Huguenots.
Charles died of tuberculosis in 1574, without legitimate male issue, and was succeeded by his brother Henry III.
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.
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.
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.
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.

Question: Who is the mother-in-law of Elisabeth Of Austria, Queen Of France?
Answer: Catherine de' Medici