Cornelia (mother of the Gracchi)
Cornelia( c. 190s – c. 115 BC) was the second daughter of Publius Cornelius Scipio Africanus, the hero of the Second Punic War, and Aemilia Paulla.
She is remembered as a prototypical example of a virtuous Roman woman.
She was the mother of the Gracchi brothers, and the mother- in- law of Scipio Aemilianus.
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.
Countess Marie-Jenke Keglevich of Buzin
Countess Marie-Jenke Keglevich of Buzin (23 April 19215 October 1983) was the second wife of Albrecht, Duke of Bavaria, head of the House of Wittelsbach and pretender to the Kingdom of Bavaria from 1955 to 1996 as well as Jacobite pretender to the thrones of England, Scotland, Ireland, and France.
Wittelsbach loyalists hold that she was the rightful Queen Consort of Bavaria from 1971-83.
Jacobites consider her the rightful Queen Consort of England, Scotland, Ireland, and France during the same period.
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.
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.
Albrecht, Duke of Bavaria
Albrecht, Duke of Bavaria (Albrecht Luitpold Ferdinand Michael; 3 May 1905 – 8 July 1996) was the son of the last crown prince of Bavaria, Rupprecht, and his first wife, Duchess Marie Gabrielle in Bavaria.
He was the only child from that marriage that reached adulthood.
His paternal grandfather was Ludwig III of Bavaria, the last king of Bavaria, who was deposed in 1918.
Henriette Mendel
Henriette Mendel, Baroness von Wallersee( July 31, 1833 – November 12, 1891) was a German actress, and the mistress and, later, morganatic wife of Ludwig Wilhelm, Duke in Bavaria.
By him she was the mother of Countess Marie Larisch von Moennich.
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.
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.

Question: Who is Countess Marie-Jenke Keglevich Of Buzin's mother-in-law?
Answer: Duchess Marie Gabrielle in Bavaria