Taddea Visconti
Taddea Visconti, Duchess of Bavaria (1351 – 28 September 1381) was an Italian noblewoman of the Visconti family, the ruling house in Milan from 1277 to 1447.
She was the first wife of Stephen III, Duke of Bavaria, and the mother of the French queen Isabeau of Bavaria.
Louis II, Duke of Bavaria
Ludwig I or Louis I of Upper Bavaria  (13 April 1229 – 2 February 1294) was Duke of Upper Bavaria and Count Palatine of the Rhine from 1253.
He is known as Ludwig II or Louis II as Duke of Bavaria, and also as Louis the Strict.
Born in Heidelberg, he was a son of duke Otto II and Agnes of the Palatinate.
She was a daughter of the Welf Henry V, Count Palatine of the Rhine, her grandfathers were Henry XII the Lion and Conrad of Hohenstaufen.
Joanna, Duchess of Brabant
Joanna, Duchess of Brabant( 24 June 1322 – 1 November 1406), also known as Jeanne, was a ruling Duchess of Brabant from 1355 until her death.
She was the heiress of Duke John III, and Marie d' Évreux.
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.
Maria of Brabant, Duchess of Bavaria
Maria of Brabant (1226–1256) was a daughter of Henry II, Duke of Brabant, and Maria of Swabia.
She married Louis II, Duke of Bavaria, being the first of three wives.
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.
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 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.
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 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 the mother-in-law of Maria Of Brabant, Duchess Of Bavaria?
Answer: Agnes of the Palatinate